Q. 2 A5.0( 6 Votes )

Atomic number of an atom Z = 17, Mass number = 35.

Find the number of protons, electrons and neutrons in the atom.

Answer :

Since, atomic number of an atom = the number of protons.

Hence, the number of protons is 17.


Now, the number of protons = the number of electrons.


The number of electrons is also 17.


Given: Mass number = 35


We know that mass number = number of protons + number of neutrons.


Number of protons + number of neutrons = 35


17 + number of neutrons = 35


Number of neutrons = 35 – 17


Number of neutrons = 18


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