Question

damm h nhi hai brainies walo m???​

Answer 1

Answer of 1'st question is -

1s^2


Here is 2nd question
Fe = 1s ^{2} 2s ^{2} 2p ^{6} 3s ^{2} 3p ^{6}
4s ^{2} 3d ^{6} for its 20th electron
n = 4
l = 0
m = 0
s = -1÷2



Hope this helps u , mark as brainliest