An atom has 4 protons and 5 neutrons with electronic configuration 2, 2. Find its mass number.

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Solution

Mass number: It is defined as the sum of number the of protons and neutrons present in the nucleus of an atom of the element.
The atom of element ‘X’ contains 4 protons and 5 neutrons, therefore, the mass number of this element will be 4+5 = 9.

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An atom has 4 protons and 5 neutrons with electronic configuration 2, 2. Find its mass number.

Mass number: It is defined as the sum of number the of protons and neutrons present in the nucleus of an atom of the element.The atom of element ‘X’ contains 4 protons and 5 neutrons, therefore, the mass number of this element will be 4+5 = 9.

Mass number: It is defined as the sum of number the of protons and neutrons present in the nucleus of an atom of the element.
The atom of element ‘X’ contains 4 protons and 5 neutrons, therefore, the mass number of this element will be 4+5 = 9.