Which of these is not true?
A. Atoms of the same elements can have different masses.
B. The nucleus of an atom has a positive charge.
C. Atoms have isotopes of an element have different numbers of protons.
D. Atoms are mostly empty space.
C. Atoms have isotopes of an element have different numbers of protons.
Explanation:
The isotopes are the variation in the number of neutrons (neutral charge), with increases the weight of the atom, so the first one, is related to this one.
