Which of the following is true ?

Options

A. Diapositive zine exbibits paramagenetism due to loss of two electron dfrom a `3d` orbitals of nutrqal atom
B. In `beta` emmision from a nucless , the atomic number of the diagram element decreases by `1`
C. The emission of one `alpha` particle from a radioactive atom result in the decreases of atomic n umber by `2` and mass number by `4`
D. The successive atom result in the decrease of atomic number by `11`

Answer

C

Explanation

a. The electronic configuration of `Zn^(2+)` (atomic number `30)` is `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)` There are no unoaired eklectrons , hence it is diamagnetic
b. In `beta` emmission , the atomic number of gaughter elements is increased by `1` due to teh basic conversion of neutron into proton in the nucleius
c. An `alpha` - particle is `_(2)^(4) He^(2+)` .Hence atomic number and number of daughter element dectrased by `2` and `4` respectgively .
d. the will occur an increases in atomic number by `2`
`overset(m)underset(n)` A overset(-beta)` to`overset(m)underset(n + 1)B overset(-beta)to overset(m) underset(n + 2)`C`