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Which of the following is the best definition of an element?

Achemical substance whose atoms all have the same number of protons
Bchemical substance that has lost or gained electrons
Cchemical substance made up of different types of atoms

Which of the following is the best definition of an element?

Achemical substance whose atoms all have the same number of protons
Bchemical substance that has lost or gained electrons
Cchemical substance made up of different types of atoms

Verified Answer :

skyluke89

Answer:

A. chemical substance whose atoms all have the same number of protons

Explanation:

An element is a substance which contains identical atoms that have the same number of protons in the nucleus.

Elements are arranged in the periodic table according to their atomic number (= number of protons): so atoms of different elements have a different number of protons in their nuclei.

For a neutral atom, the number of electrons around the nucleus is also equal to the number of protons.

Moreover, atoms of the same element can have a different number of neutrons, despite having the same number of protons - these atoms are called isotopes.

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