Which of these statements is not true?
AAtoms of the same elements can have different masses.
BThe nucleus of an atom has a positive charge.
CAtoms of isotopes of an element have different numbers of protons.
DAtoms are mostly empty space.
AAtoms of the same elements can have different masses.
BThe nucleus of an atom has a positive charge.
CAtoms of isotopes of an element have different numbers of protons.
DAtoms are mostly empty space.