Question

Find out the atomic number, mass number, number of protons, electrons and neutrons present in the element with the notation `._(92)^(238)U`

Answer 1

Atomic number (Z) = 92, Mass number (A) = 238
But we know that No. of protons = No. of electrons = Atomic number (Z)
`:.` No. of protons = 92
and No. of electrons = 92
Further, No. of neutrons = Mass number - Atomic number `A - Z = 238 - 92 = 146`