WHAT IS AN ATOM
WHO INTRODUCED IT
WHAT IS ITS SIZE
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Answered by
1
Answer:
atom is the building blocks of matter
it was discovered by Democritus
its size is 10^-10 metres
Answered by
0
Answer:
1) The smallest particle of an element, which may or may not have an independent existence but always takes place in a chemical reaction is called an atom
2) Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible).
3) Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell. Hence, different atoms have different sizes due to varying distance between valent shell and nucleus
average size = 10 ^ -10 m
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