Question

Write electron configuration for Te2-?

I am having the hardest time finding the configuration for Te2-. I need it written out the long way. I have entered 1s^22s^22p^63s^23p^63d^104s^24p^64d^105s…

and got wrong. Can someone please help!

Answers

go here..

http://www.ptable.com

click on the orbitals tab

look at the filling pattern for Te

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p4

add 2 electrons to make it -2

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6

#1

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 .

The order is not 1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, ...

But: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p , 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p

#2