Question

element X consists of 18 protons and 19 neutrons which of these is a correct depiction of the atom

Answer 1

The elements X with atomic number 'z' and mass number 'a' is written as ${}_z{X}^{a}$

Here, for element X,
number of protons = 18
number of neutrons = 19

atomic number, z = 18
mass number, a = 18+19 = 37

So it will be written as: ${}_{18} {X}^{37}$

Answer is (I)

Answer 2

Answer:

answer is i .18x37 hope it will help you