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30-12-2015
Chemistry

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What is the mass number of an alpha particle?
(1) 1 (3) 0
(2) 2 (4) 4

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30-12-2015

Your answer is (4) 4, because the alpha particle is a helium nucleus (either an ion or an ejected particle from alpha decay), and it has a mass number of 4, being consisted of four nucleons, (2 protons and 2 neutrons).

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Аноним Аноним

30-12-2015

(4) 4 is your answer because 4 is the mass number of an alpha particle.

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