Question

Define element, compound, and mixture. Option 1: Element - A substance made up of two or more types of atoms. Compound - A pure substance made up of only one type of atom. Mixture - A substance with a fixed composition. Option 2: Element - A pure substance made up of only one type of atom. Compound - A substance made up of two or more types of atoms. Mixture - A substance with a variable composition. Option 3: Element - A pure substance made up of two or more types of atoms. Compound - A substance with a variable composition. Mixture - A pure substance made up of only one type of atom. Option 4: Element - A substance with a variable composition. Compound - A pure substance made up of only one type of atom. Mixture - A substance made up of two or more types of atoms.

Answer 1

The correct definitions are: an Element is a pure substance made up of only one type of atom, a Compound is a substance made up of two or more different atoms bonded together, and a Mixture is a substance with a variable composition and can contain any number of different elements and compounds (option 2).

Step-by-step explanation:

The correct definitions are found in Option 2. An Element is a pure substance made up of only one type of atom. Examples include hydrogen, oxygen, or gold, where each substance is composed of identical atoms. A Compound is a substance made up of two or more different types of atoms bonded together.

For instance, water (H2O) is a compound as it is formed by bonding hydrogen and oxygen atoms. Lastly, a Mixture is a substance with a variable composition, meaning it can contain any number of different elements and compounds. An example can be air, which is a mixture of nitrogen, oxygen, and other substances.

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