Question

Two atoms with the same number of protons but a different number of neutrons are
a.ions of the same element.
B.in the same column of the periodic table.
C.next to each other on the periodic table.
D.isotopes of the same element.

Answer 1

Isotopes are atoms of the same element with same number of protons but different number of neutrons.

Answer 2

@yelenamartynova For example Hydrogen has three isotopes namely \(^1_1\)H, \(^2_1\)H, \(^3_1\)H. All three have same number of proton i.e 1 but different numbers of neutrons i.e 0, 1, 2 respectively.