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Question

What is an atom ? Give symbols for the atoms of the following elements:

Aluminium, sodium, potassium, gold, cadmium.


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Solution

Atom is the ultimate smallest particle of an element that maintains its chemical identity throughout all chemical and physical changes.

  1. It is the basic building block of matter
  2. Chemical reactions occur when atoms are rearranged.

ATOM

SYMBOL

Aluminium

Al

Sodium

Na

Potassium

K

Gold

Au

Cadmium

Cd


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