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Updated Mar 15, 2026
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Die Erdalkalimetalle sind eine Gruppe reaktiver Metalle mit wichtigen chemischen... Show more




Die Erdalkalimetalle Reaktionen sind vielfältig und von großer Bedeutung für verschiedene Anwendungen. Besonders wichtig sind die Reaktionen mit Sauerstoff und Wasser.
Calcium als wichtiger Vertreter der Gruppe zeigt folgende charakteristische Reaktionen:
Erdalkalimetalle Reaktion mit Sauerstoff: 2 Ca + O₂ -> 2 CaO (Calciumoxid)
Erdalkalimetalle Reaktion mit Wasser: Ca + 2H₂O -> Ca(OH)₂ + H₂
Example: Die Reaktion von Calcium mit Wasser ist lebhaft und produziert Wasserstoffgas.
Magnesium, ein weiteres wichtiges Erdalkalimetall, findet aufgrund seiner Leichtigkeit Verwendung in Legierungen für den Flugzeugbau. Es bildet an der Luft eine schützende Oxidschicht.
Highlight: Die Passivierung von Magnesium durch eine Oxidschicht schützt das Metall vor weiterer Korrosion.
Strontium und Barium spielen eine besondere Rolle in der Pyrotechnik:
Vocabulary: Flammenfärbung - charakteristische Färbung einer Flamme durch bestimmte chemische Elemente.
Diese Eigenschaft macht sie zu wichtigen Bestandteilen von Feuerwerk Farben Chemie.
Example: In der Feuerwerksrakete Aufbau werden verschiedene Metallsalze verwendet, um farbige Effekte zu erzielen.
Barium hat zudem Anwendungen in der Medizin und Technologie:
Highlight: Lösliche Bariumsalze sind hochgiftig. Schon geringe Mengen können tödlich sein.
Die hohe Reaktivität der Erdalkalimetalle erklärt ihr Erdalkalimetalle Vorkommen in der Natur ausschließlich in gebundener Form als Salze, nie als reine Elemente.

Für detailliertere Informationen über die Erdalkalimetalle Eigenschaften, ihre Reaktionen und Anwendungen können folgende Quellen konsultiert werden:
Die Website schule-studium.de bietet umfassende Informationen zum Thema Erdalkalimetalle im Chemieunterricht.
Auf chemische-experimente.com finden sich praktische Experimente und Erklärungen zu den Reaktionen der Erdalkalimetalle.
Das Online-Lexikon Chemgapedia stellt detaillierte Informationen über die Gruppe der Erdalkalimetalle zur Verfügung, einschließlich ihrer chemischen und physikalischen Eigenschaften.
Diese Quellen ermöglichen es, das Wissen über Erdalkalimetalle zu vertiefen und ihre Bedeutung in verschiedenen Bereichen der Chemie und Technologie besser zu verstehen.
Highlight: Die Erforschung und das Verständnis der Erdalkalimetalle sind von großer Bedeutung für viele Bereiche der Wissenschaft und Technik, von der Materialwissenschaft bis hin zur Medizin.

Die Erdalkalimetalle bilden die 2. Hauptgruppe des Periodensystems und umfassen Beryllium, Magnesium, Calcium, Strontium, Barium und Radium. Der Name leitet sich von ihrem häufigen Vorkommen in der Erdkruste und ihrer alkalischen Reaktion ab.
Definition: Erdalkalimetalle sind Leichtmetalle mit einer Dichte unter 4,5 g/cm³, die in der Natur als zweifach positive Kationen vorkommen.
Diese Elemente zeichnen sich durch folgende Eigenschaften aus:
Highlight: Magnesium und Calcium gehören zu den zehn häufigsten Elementen in der Erdkruste.
Die Erdalkalimetalle Eigenschaften Tabelle zeigt wichtige physikalische Merkmale wie Schmelz- und Siedetemperaturen sowie die charakteristische Flammenfärbung. Besonders auffällig ist, dass Beryllium sich in seinen Eigenschaften von den anderen Elementen der Gruppe unterscheidet.
Vocabulary: Passivierung - Bildung einer schützenden Oxidschicht auf der Metalloberfläche, die weitere Reaktionen verhindert.
Die Passivierung erklärt, warum Beryllium und Magnesium nur langsam mit Wasser reagieren, obwohl sie zu den unedlen Metallen gehören.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Die Erdalkalimetalle sind eine Gruppe reaktiver Metalle mit wichtigen chemischen und physikalischen Eigenschaften. Sie umfassen Beryllium, Magnesium, Calcium, Strontium, Barium und Radium.
• Erdalkalimetalle Eigenschaften: Leichtmetalle mit geringer Dichte, weich und verformbar (außer Beryllium)
• Erdalkalimetalle Reaktionen: Reagieren... Show more

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Die Erdalkalimetalle Reaktionen sind vielfältig und von großer Bedeutung für verschiedene Anwendungen. Besonders wichtig sind die Reaktionen mit Sauerstoff und Wasser.
Calcium als wichtiger Vertreter der Gruppe zeigt folgende charakteristische Reaktionen:
Erdalkalimetalle Reaktion mit Sauerstoff: 2 Ca + O₂ -> 2 CaO (Calciumoxid)
Erdalkalimetalle Reaktion mit Wasser: Ca + 2H₂O -> Ca(OH)₂ + H₂
Example: Die Reaktion von Calcium mit Wasser ist lebhaft und produziert Wasserstoffgas.
Magnesium, ein weiteres wichtiges Erdalkalimetall, findet aufgrund seiner Leichtigkeit Verwendung in Legierungen für den Flugzeugbau. Es bildet an der Luft eine schützende Oxidschicht.
Highlight: Die Passivierung von Magnesium durch eine Oxidschicht schützt das Metall vor weiterer Korrosion.
Strontium und Barium spielen eine besondere Rolle in der Pyrotechnik:
Vocabulary: Flammenfärbung - charakteristische Färbung einer Flamme durch bestimmte chemische Elemente.
Diese Eigenschaft macht sie zu wichtigen Bestandteilen von Feuerwerk Farben Chemie.
Example: In der Feuerwerksrakete Aufbau werden verschiedene Metallsalze verwendet, um farbige Effekte zu erzielen.
Barium hat zudem Anwendungen in der Medizin und Technologie:
Highlight: Lösliche Bariumsalze sind hochgiftig. Schon geringe Mengen können tödlich sein.
Die hohe Reaktivität der Erdalkalimetalle erklärt ihr Erdalkalimetalle Vorkommen in der Natur ausschließlich in gebundener Form als Salze, nie als reine Elemente.

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Improve your grades
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Für detailliertere Informationen über die Erdalkalimetalle Eigenschaften, ihre Reaktionen und Anwendungen können folgende Quellen konsultiert werden:
Die Website schule-studium.de bietet umfassende Informationen zum Thema Erdalkalimetalle im Chemieunterricht.
Auf chemische-experimente.com finden sich praktische Experimente und Erklärungen zu den Reaktionen der Erdalkalimetalle.
Das Online-Lexikon Chemgapedia stellt detaillierte Informationen über die Gruppe der Erdalkalimetalle zur Verfügung, einschließlich ihrer chemischen und physikalischen Eigenschaften.
Diese Quellen ermöglichen es, das Wissen über Erdalkalimetalle zu vertiefen und ihre Bedeutung in verschiedenen Bereichen der Chemie und Technologie besser zu verstehen.
Highlight: Die Erforschung und das Verständnis der Erdalkalimetalle sind von großer Bedeutung für viele Bereiche der Wissenschaft und Technik, von der Materialwissenschaft bis hin zur Medizin.

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Improve your grades
Join milions of students
Die Erdalkalimetalle bilden die 2. Hauptgruppe des Periodensystems und umfassen Beryllium, Magnesium, Calcium, Strontium, Barium und Radium. Der Name leitet sich von ihrem häufigen Vorkommen in der Erdkruste und ihrer alkalischen Reaktion ab.
Definition: Erdalkalimetalle sind Leichtmetalle mit einer Dichte unter 4,5 g/cm³, die in der Natur als zweifach positive Kationen vorkommen.
Diese Elemente zeichnen sich durch folgende Eigenschaften aus:
Highlight: Magnesium und Calcium gehören zu den zehn häufigsten Elementen in der Erdkruste.
Die Erdalkalimetalle Eigenschaften Tabelle zeigt wichtige physikalische Merkmale wie Schmelz- und Siedetemperaturen sowie die charakteristische Flammenfärbung. Besonders auffällig ist, dass Beryllium sich in seinen Eigenschaften von den anderen Elementen der Gruppe unterscheidet.
Vocabulary: Passivierung - Bildung einer schützenden Oxidschicht auf der Metalloberfläche, die weitere Reaktionen verhindert.
Die Passivierung erklärt, warum Beryllium und Magnesium nur langsam mit Wasser reagieren, obwohl sie zu den unedlen Metallen gehören.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user