2 Answers

Taras Lozovyi · Answer 1 · 2017-09-17T06:50:02+0000

Mass number is 12.01g What you do first to find is find how many protons it such as this atom has 6 so it going to be number 6 on the periodic table then find the mass

Matuku · Answer 2 · 2017-09-21T04:03:28+0000

Hi, the answer is 13 , because the total of protons and neutrons together form the mass , in other words there are 6 protons and 7 neutrons , 6+7=13.

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