An atom contains 3 protons, 3 electrons and 4 neutrons. Give its :
(b) Mass number

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Solution

Given:
Number of protons $= 3$
Number of electrons $= 3$
Number of neutrons $= 4$
Calculate the mass number of the atom:
Mass number $=$ Number of protons $+$ Number of neutrons
Thus,
Mass number $= 3 + 4$
Mass number $= 7$
Thus, the mass number of the atom is $7$ .

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An atom contains 3 protons, 3 electrons and 4 neutrons. Give its :(b) Mass number

Given:Number of protons=3Number of electrons=3Number of neutrons=4Calculate the mass number of the atom:Mass number=Number of protons+Number of neutronsThus,Mass number=3+4Mass number=7Thus, the mass number of the atom is 7.

An atom contains 3 protons, 3 electrons and 4 neutrons. Give its :
(b) Mass number

Given:
Number of protons $= 3$
Number of electrons $= 3$
Number of neutrons $= 4$
Calculate the mass number of the atom:
Mass number $=$ Number of protons $+$ Number of neutrons
Thus,
Mass number $= 3 + 4$
Mass number $= 7$
Thus, the mass number of the atom is $7$ .