How many neutrons does the following nuclide have? 253/100 fm a. 253 b. 100 c. 153 d. none of these

Answer : The correct option is, (C) 153

Explanation :

Atomic number is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and number of neutrons.

Number of neutrons = Mass number - Number of protons

or,

Number of neutrons = Mass number - Atomic number

As we are given that:

The given nuclide is,

'Fm' is the fermium element.

Mass number of 'Fm' = 253

Atomic number f 'Fm' = 100

Now we have to determine the number of neutrons.

Number of neutrons = Mass number - Atomic number

Number of neutrons = 253 - 100

Number of neutrons = 153

Therefore, the number of neutrons in the 'Fm' nuclide have 153.

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