Answer:
All the numbers in a chemical formula are significant, It is because the numbers in a chemical formula denote the number of different atoms present in the particular compound.
For example in H2SO4 there are 2 H 1 S and 4 O. This means 1 H2SO4 has 2 hydrogen 1 sulphur and 4 oxygen.
When 2 elements are combined it creates an ionic compound
Electron was discovered by J. J. Thomson in 1897 when he was studying the properties of cathode ray.
The answer is zero!
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