Question

the atom has 9 electron 9 proton and 10 neutron a.what is the atomic no. of element b.what is the mass no. of element c. name the elements and given its electronic configuration c. predict the valency of element​

Answer 1

Answer:

a.atomic no. is 9

b. atomic mass no. is 19

c. element is flurine and electronic configuration is 2,7

d. valency of element is 1. it will gain 1 electron to get stability