Learn Relative Atomic Mass, First Ionisation Energy, and Formula Differences

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26/03/2023

Chemistry

A level chemistry definitions

Subjects

Chemistry

Physical chemistry

Amount of substance

Learn Relative Atomic Mass, First Ionisation Energy, and Formula Differences

The relative atomic mass in chemistry is a fundamental concept that helps understand atomic structure and chemical calculations. This comprehensive guide covers key definitions in atomic structure, amount of substance, bonding, energetics, kinetics, equilibria, and organic chemistry.

Key points include:

Relative atomic mass definition explains weighted mean mass comparisons
First ionisation energy in chemistry explanation covers electron removal processes
Differences between empirical and molecular formula in chemistry highlight structural representations
Detailed coverage of bonding types and energy concepts
In-depth exploration of organic chemistry fundamentals

26/03/2023

AQA A LEVEL CHEMISTRY - DEFINITION LIST
Atomic structure
Isotope:
An atom of the same element that has the same number of protons and electr

Bonding and Molecular Concepts

This section explores various types of chemical bonding and molecular structure concepts. It covers metallic, covalent, and ionic bonding, along with important molecular calculations.

Definition: Atom economy measures reaction efficiency by comparing desired product mass to total product masses.

Vocabulary: Electronegativity refers to an atom's ability to attract bonding electrons in a covalent bond.

Example: A dative covalent bond forms when one atom provides both electrons in the shared pair.

Highlight: Understanding different bonding types is essential for predicting molecular properties and chemical behavior.

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Energetics and Reaction Processes

This section details energy changes in chemical reactions, including enthalpy changes and bond energies.

Definition: Enthalpy change represents heat energy changes measured at constant pressure.

Vocabulary: Activation energy is the minimum energy required to initiate a reaction through bond breaking.

Example: Exothermic reactions release heat energy $negative values$ , while endothermic reactions absorb heat energy $positive values$ .

Highlight: Bond enthalpy calculations are crucial for predicting overall reaction energetics.

View

Kinetics and Equilibria

This section covers reaction rates and equilibrium concepts, including Le Chatelier's Principle.

Definition: Reaction rate measures the change in concentration of reactants or products over time.

Quote: "Le Chatelier's Principle states that when a reaction at equilibrium is subjected to change, the position of equilibrium moves to counteract that change."

Highlight: Understanding kinetics and equilibria is essential for controlling industrial chemical processes.

View

Organic Chemistry Fundamentals

This section introduces basic organic chemistry concepts, including hydrocarbon classification and molecular representations.

Definition: A hydrocarbon is a compound containing only hydrogen and carbon atoms.

Vocabulary: Saturated compounds contain only single carbon-carbon bonds, while unsaturated compounds have at least one double bond.

Example: Different formula representations include displayed, structural, and skeletal formulas.

View

Molecular Representations

This section focuses on various ways to represent molecular structures in organic chemistry.

Definition: The molecular formula shows the actual number of atoms of each element in a compound.

Example: CH3CH2OH can be represented in multiple ways: displayed, structural, or skeletal formula.

Highlight: Understanding different molecular representations is crucial for organic chemistry comprehension.

View

Organic Chemistry Classifications

This section covers the classification of organic compounds and their functional groups.

Definition: A homologous series is a family of compounds with the same functional group and general formula, differing by CH2 units.

Vocabulary: Functional groups are specific atoms or groups that determine compound properties.

Highlight: Recognition of functional groups is essential for predicting chemical behavior and reactions.

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Subjects

Chemistry

Physical chemistry

Amount of substance

Chemistry

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26 Mar 2023

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7 pages

Learn Relative Atomic Mass, First Ionisation Energy, and Formula Differences

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Bonding and Molecular Concepts

This section explores various types of chemical bonding and molecular structure concepts. It covers metallic, covalent, and ionic bonding, along with important molecular calculations.

Definition: Atom economy measures reaction efficiency by comparing desired product mass to total product masses.

Vocabulary: Electronegativity refers to an atom's ability to attract bonding electrons in a covalent bond.

Example: A dative covalent bond forms when one atom provides both electrons in the shared pair.

Highlight: Understanding different bonding types is essential for predicting molecular properties and chemical behavior.

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Energetics and Reaction Processes

This section details energy changes in chemical reactions, including enthalpy changes and bond energies.

Definition: Enthalpy change represents heat energy changes measured at constant pressure.

Vocabulary: Activation energy is the minimum energy required to initiate a reaction through bond breaking.

Example: Exothermic reactions release heat energy $negative values$ , while endothermic reactions absorb heat energy $positive values$ .

Highlight: Bond enthalpy calculations are crucial for predicting overall reaction energetics.

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Kinetics and Equilibria

This section covers reaction rates and equilibrium concepts, including Le Chatelier's Principle.

Definition: Reaction rate measures the change in concentration of reactants or products over time.

Quote: "Le Chatelier's Principle states that when a reaction at equilibrium is subjected to change, the position of equilibrium moves to counteract that change."

Highlight: Understanding kinetics and equilibria is essential for controlling industrial chemical processes.

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Organic Chemistry Fundamentals

This section introduces basic organic chemistry concepts, including hydrocarbon classification and molecular representations.

Definition: A hydrocarbon is a compound containing only hydrogen and carbon atoms.

Vocabulary: Saturated compounds contain only single carbon-carbon bonds, while unsaturated compounds have at least one double bond.

Example: Different formula representations include displayed, structural, and skeletal formulas.

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Molecular Representations

This section focuses on various ways to represent molecular structures in organic chemistry.

Definition: The molecular formula shows the actual number of atoms of each element in a compound.

Example: CH3CH2OH can be represented in multiple ways: displayed, structural, or skeletal formula.

Highlight: Understanding different molecular representations is crucial for organic chemistry comprehension.

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Organic Chemistry Classifications

This section covers the classification of organic compounds and their functional groups.

Definition: A homologous series is a family of compounds with the same functional group and general formula, differing by CH2 units.

Vocabulary: Functional groups are specific atoms or groups that determine compound properties.

Highlight: Recognition of functional groups is essential for predicting chemical behavior and reactions.

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Atomic Structure and Basic Definitions

This section introduces fundamental atomic concepts and definitions essential for understanding chemistry at an advanced level. The content focuses on isotopes, relative atomic mass, and ionization energy.

Definition: Relative atomic mass is defined as the weighted mean mass of an atom compared with 1/12th of the mass of carbon-12.

Vocabulary: Isotopes are atoms of the same element with identical proton and electron numbers but different neutron counts.

Example: The first ionisation energy process can be represented as X $g$ → X $g$ + + e-, where energy is required to remove one electron from a gaseous atom.

Highlight: Understanding relative atomic mass calculations is crucial for determining molecular masses and stoichiometry in chemical reactions.

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Learn Relative Atomic Mass, First Ionisation Energy, and Formula Differences

Bonding and Molecular Concepts

Energetics and Reaction Processes

Kinetics and Equilibria

Organic Chemistry Fundamentals

Molecular Representations

Organic Chemistry Classifications

Similar content

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

4.9+

21 M

#1

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Still not convinced? See what other students are saying...

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

The app is very simple and well designed. So far I have always found everything I was looking for :D

I love this app ❤️ I actually use it every time I study.

Learn Relative Atomic Mass, First Ionisation Energy, and Formula Differences

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Bonding and Molecular Concepts

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Energetics and Reaction Processes

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Kinetics and Equilibria

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Organic Chemistry Fundamentals

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Molecular Representations

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Organic Chemistry Classifications

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Atomic Structure and Basic Definitions

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