Question

what is an atom ??????????
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Answer 1

Answer:

The smallest part into which an element can be divided is called atom .

Explanation:

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Answer 2

$\boxed{atom}$

Atom is the smallest part of the element that takes part in a chemical reaction . Atom of an element can not be changed into that of another element by a chemical or physical means. it does not exist in free State .

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$\boxed{atomic \: weight \:or \: atomic \: mass}$

the atomic mass of an element is the number of times it's atom is heavier than

$\frac{1}{2}$

of the mass of carbon (c12) atom.

The unit used to measure atomic mass called atomic mass unit , example : amu.

$\boxed{electron}$

The electron is a fundamental particle of an atom which carries a unit negative charge. it was discovered by J.J. Thomson in 1897 .

$\boxed{proton \:}$

it is a fundamental particle of an atom carrying a unit positive charge. it was discovered by Rutherford and Goldstein in 1886.

$\boxed{neutron \: }$

It is a fundamental particle of an atom carrying no charge. it was discovered by Chadwick in 1932.