Question

write down the symbolic notation of the following atoms mentioning their atomic no. and mass no. sulphur​

Answer 1

Answer:

Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons. Since 2+2=4, we know that the mass number of the helium atom is 4.

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Mass Number.

Name hydrogen

Symbol H

Atomic Number (Z) 1

Protons 1

Neutrons 0