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kirill115 [55]
4 years ago
12

When a radioactive atom emits an alpha particle, the original atom's atomic number decreases by four.

Chemistry
1 answer:
solniwko [45]4 years ago
5 0
Ya it is true, alpha particle is actually helium atom with no electrons !
He2+ and it has mass of 4 u ....So that is correct !
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