Question

Which statements describe elements? Check all that apply.

Atoms of the same element can have different numbers of protons.
Atoms of the same element always have the same number of electrons.
Atoms of the same element can have different numbers of neutrons.
Atoms of the same element always have the same number of neutrons.
Atoms of the same element always have the same number of protons.
Atoms of the same element can be isotopes of that element.

Answer 1

Atoms of the same element always have the same number of protons.
Atoms of the same element can be isotopes of that element.