Question

An atom has mass number A and atomic number Z. How many nucleons are present in it?​

Answer 1

Answer:

Consider the element helium. 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.

Now refer to the attached file.....!

Answer 2

Answer:

Its nucleus also contains two neutrons. Since 2+2=4, we know that the mass number of the helium atom is 4. Finally, the helium atom also contains two electrons, since the number of electrons must equal the number of protons.

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Mass Number.

Name carbon

Symbol C

Atomic Number (Z) 6

Protons 6

Neutrons 6