Which of the following is the composition of an isotope of calcium (atomic number 20) ?

Question

Jamar Blanchard

Chemistry

17 May, 23:08

Which of the following is the composition of an isotope of calcium (atomic number 20) ?

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Answers (2)

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Blackburn · Answer 1

20 protons

20 electrons (as much elctrons as protons because there has to be same positive and negative to have a neutral atom)

And the number of neutrons depends of the mass number but in that case, I think that it's a Calcium atom (Ca) and so there are 20 netrons.

Laura York · Answer 2

20 protons

25 neutrons

20 electrons