A prologue of a book is an example of a message. a.
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An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.

Identify the decay mode particle emitted from the th 234