Electron Configuration

[Quincy]

I just need to refresh my memory:

When writing electron configurations for elements in the d block such as Iron (Fe), would you write it like this: 1s2 2s2 2p6 3s2 3p6 4s2 4d6

OR

like this: 1s2 2s2 2p6 3s2 3p6 4s2 4p6 4d6

[Ygggdrasil]

I just need to refresh my memory:

When writing electron configurations for elements in the d block such as Iron (Fe), would you write it like this: 1s2 2s2 2p6 3s2 3p6 4s2 4d6

This is perfectly acceptable except it's 3d6, not 4d6.

like this: 1s2 2s2 2p6 3s2 3p6 4s2 4p6 4d6

This is incorrect. It has too many electrons.

[Quincy]

This is perfectly acceptable except it's 3d6, not 4d6.
isn't Iron in the 4th period though?

[Borek]

isn't Iron in the 4th period though?

It doesn't matter. You can't fill 4d before 3d.

[Quincy]

Write the electron configuration (long way) for yttrium:

1s2 2s2 2p6 3s2 3p6 4s2 4p6 4d10 5s2 5p6 5d1

-- is that correct?

[Borek]

No. You have just ignored my previous post.

[Quincy]

Sorry; how about this:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d1

how about this one: Write the electron configuration using the Noble Gas shortcut for mendeleevium:

[Rn] 7s2 6f13

[Quincy]

bump