What do all elements have in common? A. they cannot lose or gain electrons
B. They are made of a single type of atom.
C. they have the same number of protons
D. they have the same number of neutrons

B) All elements are made of a single type of atom.

Explanation:

Elements are made up of a single type of atom and are bound together chemically. Elements cannot be broken down further by chemical or physical means.

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