A pure substance composed of only one type of atom is called what?

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Multiple Choice

A pure substance composed of only one type of atom is called what?

Explanation:
When a pure substance contains only one kind of atom, it is called an element. That means the entire substance is made up of the same type of atom, although those atoms can exist as individual atoms or as diatomic molecules like O2 or N2. A molecule, in general, is a group of atoms bonded together and can be formed from the same element or from different elements. A compound is a substance formed when two or more different elements combine in a fixed ratio. An atom is the basic unit of an element, but a single atom by itself isn’t a substance described as an element; the element category refers to the type of atom present in the substance as a whole.

When a pure substance contains only one kind of atom, it is called an element. That means the entire substance is made up of the same type of atom, although those atoms can exist as individual atoms or as diatomic molecules like O2 or N2. A molecule, in general, is a group of atoms bonded together and can be formed from the same element or from different elements. A compound is a substance formed when two or more different elements combine in a fixed ratio. An atom is the basic unit of an element, but a single atom by itself isn’t a substance described as an element; the element category refers to the type of atom present in the substance as a whole.

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