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Learn: Elements, Compounds, and Mixtures
AQA GCSE Chemistry 8462 specification
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Welcome!Today we'll explore the differences between elements, compounds, and mixtures. This is an important topic for understanding the basics of chemistry. Let's get started!
What is an Element?An element is a substance made up of only one type of atom. It cannot be broken down into simpler substances by chemical means. Examples include oxygen (O), hydrogen (H), and gold (Au).
Which of these is an element?
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What is a Compound?A compound is a substance formed when two or more elements chemically combine in fixed proportions. Compounds have different properties from the elements they're made of. For example, water (H2O) is made from hydrogen and oxygen.
Which of the following are compounds? (Select all that apply)
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What is a Mixture?A mixture is made up of two or more substances (elements or compounds) that are physically combined, not chemically bonded. Mixtures can be separated by physical methods such as filtration or distillation. An example is air, which contains nitrogen, oxygen, and other gases.
A mixture is made up of substances that are {{blank0}} combined, not {{blank1}} bonded.
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Key DifferencesElements contain only one type of atom. Compounds are made of elements chemically bonded together, while mixtures are physical combinations of substances. Understanding these differences helps when analysing materials.
Match the items on the left with their correct pairs on the right
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Review Time!Great work! You've learned about elements, compounds, and mixtures. Now let's test your understanding with a few questions.
Which of the following can be separated by physical methods?
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Which statements are true about compounds? (Select all that apply)
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An element contains only {{blank0}} type of atom, while a compound contains {{blank1}} types of atoms chemically bonded.
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