The term
atom from the Greek word atomos , meaning
Indivisible
earlier it was considered that atoms were the smallest unit of a substance
and could not be split further. today, we know that atoms can be further
Split into
smaller particles. An atom is made up of the atomic nucleus, which consists of
positively charged protons and an equal number of neutrons, and atomic shells.
These are occupied by negatively charged electrons, which move at high speeds
around the atomic nucleus –like planets around the sun.
(A carbon
atom(c). there are twelve particles in the nucleus: six protons and six
neutrons. Six electrons move in two shell-like areas around the nucleus the
number of protons determines the element.)
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