Name the following
1) element has double e- in the L shell
Than K shell.
2) An inert gas which not have fulfilled
3) An element used in cancer treatment.

Dear student, 
Please find the answers below for your queries:
1. The element which has double electrons in the L shell than K shell is Carbon. It has atomic no.6 so there are 2 electrons in K shell and 4 electrons in Love shell.
2. Helium is the inert gas which doesn't have complete octet. 
3. Cobalt-60 is used to treat cancer. 
Regards.

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