Q. 15.0( 6 Votes )

What are the number of protons, neutrons, and electrons in What are their atomic number and mass number?

Answer :

Any element can be represented with its atomic number, symbol and its atomic mass using a simple representation. Any element ‘X’ having the atomic number ‘A’ and atomic mass ‘M’ can be represented as ΜAX.

For 168O:


No. of protons = 8


No. of electrons = 8


No. of neutrons = (16 – 8) = 8 (atomic mass minus the protons is neutrons)


Atomic no. = 8


Mass no. = 16


For 1840Ar:


No. of protons = 18


No. of electrons = 18


No. of neutrons = (40 – 18) = 22


Atomic no. = 18


Mass no. = 40


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