Given the element aluminium with atomic number 13 and number of neutrons 14.Find the mass number, number of protons, number of electrons and electronic configuration.

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Solution

The element aluminum (Al) is a group 13 element. The atomic number, which is equal to the number of protons in an atom is given as 13. Hence the number of protons = 13.
In a neutral atom, the number of electrons will be equal to the number of protons. Hence the number of electrons = 13.
Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus
Hence the electronic configuration is 2,8,3.
The mass number is the sum of the number of protons and neutrons.
Given the number of protons = 13, the number of neutrons = 14.
Hence mass number = (13+14) = 27.

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