O
6
The symbols of two atoms may be written as shown.
53X 52Y
Which statement about these atoms is correct?
A They are different elements because they have different numbers of neutrons.
They are different elements because they have different numbers of protons.
B
C
They are isotopes of the same element because they have the same nucleon number.
D They are isotopes of the same element because they have the same proton number.
41 Chapter