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Answer 1

1. Compounds are formed when two or more elements are chemically combined.
2. When these elements are chemically combined, a new substance is formed with new chemical and physical properties.
3. An element is a pure substance that cannot be separated into simpler substances by physical or chemical means.
4. A compound is two or more elements combined chemically to produce a new substance.
5. When two or more elements chemically combine, the compound has new properties, different from the chemical and physical properties of the original elements.

What is a chemical element?

A chemical element can be defined as a pure substance which comprises atoms that have the same atomic number (number of protons) in its nuclei and as such it is the primary constituent of matter.

Generally, some examples of a chemical element include the following:

1. Argon.
2. Sodium.
3. Carbon.
4. Oxygen.
5. Hydrogen.
6. Phosphorus
7. Copper
8. Aluminum
9. Potassium
10. Magnesium

What is a pure substance?

A pure substance can be defined as a single sample of matter that cannot be separated into other kinds of matter through the use of any physical or chemical separating technique because it has distinct chemical properties and a definite and constant composition.

Read more on pure substances here: brainly.com/question/2056940

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