Question

mass number of d is 40 and atomic number of d is 18 how many nucleons are there in an atom of d​

Answer 1

Answer:

Number of Protons = atomic number = 20.

Therefore, number of protons = 20.

Number of electrons = number of protons = 20.

Number of neutrons = Mass number - number of protons = 40-20 = 20.

Number of protons half the number of neurons

mark me as brainliest.