How are regular carbon, carbon 11, and carbon 14 the same?

They have the same number of protons and neutrons .

Explanation :

Carbon, Carbon 11 and Carbon 14 are Isotopes ( Isotopes are forms of an element that have the same number of protons and electrons but different numbers of neutrons ) . Isotopes have the same atomic number.

I hope this helps.

put the answers   and i could answer.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.