Question

An element x has mass number 35 and number of neutrons 18 write atomic no and electronic confirmation

Answer 1

answer is k=2 l=8 &m=7

refer to attachment for explanation .. pls mark as brainliest

Answer 2

Answer:-

atomic number = mass number- no. of neutrons

atomic number = 35-18= 17

so the element must be chlorine because atomic number of chlorine is 17.

Electronic configuration of chlorine =

1s² 2s² 2p6 3s² 3p5