The Two Isotopes Shown Below Differ in the Number Of $${ } _ { 6 } ^ { 12 } \text { C } { } _ { 6 } ^ { 14 } \text { C }$$

Multiple Choice

The two isotopes shown below differ in the number of $${ } _ { 6 } ^ { 12 } \text { C } { } _ { 6 } ^ { 14 } \text { C }$$

A) electrons.
B) protons.
C) neutrons.
D) carbon atoms.
E) ionic bonds.