Question

What is that abbreviated electron configuration for cobalt?

Answer 1

[Ar]
`4s^(2)3d^(7)`

Step-by-step explanation:

To write abbreviated electron configurations, begin with the element of interest and work your way down in atomic numbers to the next smallest noble gas.

Write the noble gas symbol in [brackets] and then write the electron configuration as you would normally.

I hope this helps you

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