bellbrianna57 bellbrianna57

03-11-2020
Chemistry

contestada

an electrically neutral atom consists of 15 neutrons, 13 electrons, and a number
of protons. What is its mass number?

A.13

B.15

C.28

D.30

Respuesta :

lukegreen1977 lukegreen1977

03-11-2020

Answer:c

Explanation: it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28

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