Question

Atomic number of aluminium is 13 and mass number is 27. Calculate the number of electrons, Protons and neutrons in its atom. Represent the ion of this element.

Answer 1

Given that,

Atomic number of aluminium is 13 and its mass number is 27.

To find,

The number of electrons, protons and neutrons in its atom.

Solution,

We know that, atomic number is equal to number of protons and number of protons is equal to the number of electrons in an atom.

Here, atomic number of Aluminium is 13. It mans the number of electrons and protons are 13.

Also,

Mass number is the sum of number of protons and the number of neutrons. So,

Number of neutrons = 27 - 13 = 14

Learn more,

Atomic number and atomic mass

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