Question

The number of electrons in an element with atomic number X and atomic mass number Y will be_____​

Answer 1

Answer:The number of electrons in an element with atomic number X and mass number Y will be X. It will be equal to the number of protons. The number of neutrons will be Y−X.

Number of electrons = number of protons = atomic number.

Number of neutrons = Mass number − atomic number.

Answer 2

Answer:

X

Explanation:

because the atomic no. represents the no. of protons un the nucleus and no. of protons and electrons in an atom is same .Hence if the atomic. no. is X then the no. of electrons is also X