Q2 of 29 Page 72

The smallest particle of matter is:

Atom is considered the smallest indivisible building block of matter in Dalton’s Atomic theory. Atoms bond together to form a molecule. An element is formed by atoms of the same kind. A compound is formed by elements combining in a definite proportion. The smallest particle out of the given options is atom.

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1

Which type of radiation was used in Rutherford’s experiment?

 3

First periodic classification of element was given by:

 4

Modern periodic table is based on which property of the elements:

 5

The number of period and groups in modern periodic table are: