An electrically charged atom or a group of atoms is known as

1.	An electrically charged atom or a group of atoms is known as [BHU 1979]
A.	A meson
B.	A proton
C.	An ion
D.	A cyclotron
Answer» D. A cyclotron

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An electrically charged atom or a group of atoms is known as [BHU 1979]

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