What is the electron configuration for Strontium?

Answer 1

Take a look at the Periodic Table. Strontium is two elements beyond Krypton (a noble gas). Strontium is in the second column (Group 2) of Period 5 so the electron configuration is 5s² + Kr and Kr is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ so Sr is: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s²