A) hydrogen atom
B) helium ion
C) hydrogen ion
D) helium nucleus
Correct Answer: D
Solution :
Alpha particles are composite particles consisting of two protons and two neutrons tightly bound together as shown in figure. They are emitted from the nucleus of some radio nuclides during a form of radioactive decay, called alpha-decay. An alpha, particle is identical to the nucleus of a normal (atomic mass 4) helium atom or a doubly ionized helium atom.You need to login to perform this action.
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