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29 Dec 2025
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Understanding the Reactivity Series and Displacement Reactions
Charlotte
@charlotte26
1 / 7
What is the Reactivity Series?
Think of the reactivity series as a ranking system that puts metals in order from most to least reactive. The most reactive metals sit at the top, whilst the least reactive ones hang out at the bottom.
But what does "more reactive" actually mean? It's all about how vigorous and forceful a metal's reactions are. The more reactive a metal is, the more easily it loses electrons to form positive ions (called cations).
Quick tip: Remember that reactive metals are like eager students - they're always ready to jump into action and lose their electrons!
The Reactivity Series Order
Here's the classic way to remember the order using a memorable phrase: "Please Stop Calling Me A Careless Zebra, Instead Try Learning How Copper Saves Gold Perfectly."
This translates to: Potassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Hydrogen, Tin, Lead, Copper, Silver, Gold, Platinum.
Gold and platinum are often found pure in nature because they're so unreactive - they're called native metals. They're basically the lazy ones that can't be bothered to react with anything!
Remember: The higher up the series, the more reactive the metal!
Why Are Carbon and Oxygen Included?
You might wonder why carbon and oxygen appear in a metal reactivity series when they're not actually metals. Here's the thing - despite being non-metals, they can behave like metals in certain situations.
Both carbon and oxygen have the ability to displace less reactive metals from compounds. This makes them useful reference points in the series for understanding extraction methods and reactions.
Key insight: If a metal is more reactive than carbon, it needs electrolysis for extraction. If it's less reactive than carbon, reduction will do the job!
Understanding Displacement Reactions
Displacement reactions are like chemical bullying - a more reactive metal pushes out (displaces) a less reactive metal from its compound. It's that simple!
The rule is straightforward: if metal A is higher than metal B in the reactivity series, metal A will kick metal B out of its compound. If metal A is lower, nothing happens - the compound stays exactly the same.
Think of it as a queue where only those with higher status can push in front of others.
Golden rule: More reactive metals always win displacement battles!
Worked Example: Zinc Oxide + Lithium
Let's see displacement in action with zinc oxide + lithium. First, check the reactivity series - lithium is much higher than zinc, so it's more reactive.
Since lithium is more reactive, a displacement reaction will definitely happen. Lithium will push zinc out of its compound, forming lithium oxide and leaving pure zinc behind.
The complete equation becomes: Zinc oxide + lithium → lithium oxide + zinc. The zinc has been displaced and is now on its own!
Pro tip: Always check the reactivity series first - it tells you everything you need to know about whether a reaction will happen!
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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.
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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
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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.
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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
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THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
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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 THE SCHOOLGPT. 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
Understanding the Reactivity Series and Displacement Reactions
Charlotte
@charlotte26
The reactivity series is basically a league table for metals - it shows which ones are the most aggressive in chemical reactions. Understanding this concept is crucial for predicting what happens when different metals meet in chemistry experiments.
What is the Reactivity Series?
Think of the reactivity series as a ranking system that puts metals in order from most to least reactive. The most reactive metals sit at the top, whilst the least reactive ones hang out at the bottom.
But what does "more reactive" actually mean? It's all about how vigorous and forceful a metal's reactions are. The more reactive a metal is, the more easily it loses electrons to form positive ions (called cations).
Quick tip: Remember that reactive metals are like eager students - they're always ready to jump into action and lose their electrons!
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The Reactivity Series Order
Here's the classic way to remember the order using a memorable phrase: "Please Stop Calling Me A Careless Zebra, Instead Try Learning How Copper Saves Gold Perfectly."
This translates to: Potassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Hydrogen, Tin, Lead, Copper, Silver, Gold, Platinum.
Gold and platinum are often found pure in nature because they're so unreactive - they're called native metals. They're basically the lazy ones that can't be bothered to react with anything!
Remember: The higher up the series, the more reactive the metal!
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Why Are Carbon and Oxygen Included?
You might wonder why carbon and oxygen appear in a metal reactivity series when they're not actually metals. Here's the thing - despite being non-metals, they can behave like metals in certain situations.
Both carbon and oxygen have the ability to displace less reactive metals from compounds. This makes them useful reference points in the series for understanding extraction methods and reactions.
Key insight: If a metal is more reactive than carbon, it needs electrolysis for extraction. If it's less reactive than carbon, reduction will do the job!
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Understanding Displacement Reactions
Displacement reactions are like chemical bullying - a more reactive metal pushes out (displaces) a less reactive metal from its compound. It's that simple!
The rule is straightforward: if metal A is higher than metal B in the reactivity series, metal A will kick metal B out of its compound. If metal A is lower, nothing happens - the compound stays exactly the same.
Think of it as a queue where only those with higher status can push in front of others.
Golden rule: More reactive metals always win displacement battles!
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Worked Example: Zinc Oxide + Lithium
Let's see displacement in action with zinc oxide + lithium. First, check the reactivity series - lithium is much higher than zinc, so it's more reactive.
Since lithium is more reactive, a displacement reaction will definitely happen. Lithium will push zinc out of its compound, forming lithium oxide and leaving pure zinc behind.
The complete equation becomes: Zinc oxide + lithium → lithium oxide + zinc. The zinc has been displaced and is now on its own!
Pro tip: Always check the reactivity series first - it tells you everything you need to know about whether a reaction will happen!
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We thought you’d never ask...
What is the Knowunity AI companion?
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.
Where can I download the Knowunity app?
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Is Knowunity really free of charge?
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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 THE SCHOOLGPT. 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 THE SCHOOLGPT. 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