heat3hlCarlendo heat3hlCarlendo

07-08-2016
Chemistry

contestada

The mass number of an atom is obtained by totaling the number of _ and _.
A) electrons and protonselectrons
B) neutronsprotons and neutrons
C) neutrons and isotopes

Respuesta :

akiyama316 akiyama316

06-09-2017

Mass number is the sum of protons and neutrons inside an atom.

Atomic mass = no. of protons + no. of neutrons

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Аноним Аноним

12-09-2018

the sum of protons and neutrons inside an atom is your answer

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