An element may be represented as $_{18} X^{40}$ . Find the number of electrons, protons and neutrons in this atom.

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Solution

Number of electrons = 18

Number of protons = 18

Mass number of X=40, therefore,

Number of neutrons = 40 – 18 = 22

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An element may be represented as 18X40 . Find the number of electrons, protons and neutrons in this atom.

Number of electrons = 18 Number of protons = 18 Mass number of X=40, therefore, Number of neutrons = 40 – 18 = 22

An element may be represented as $_{18} X^{40}$ . Find the number of electrons, protons and neutrons in this atom.

Number of electrons = 18

Number of protons = 18

Mass number of X=40, therefore,

Number of neutrons = 40 – 18 = 22