sierrareid94 sierrareid94

22-10-2020
Physics

contestada

What is the mass number of an atom which contains 27 protons, 2 electrons, and 30 neutrons?

Respuesta :

akmalghufran316 akmalghufran316

23-10-2020

Answer:57

Explanation:

Because the mass number of an element is the sum of number of protons and neutrons so add up no of protons and no of neutrons.

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