How many electrons does a Mn Mn atom have in its 3 d 3d subshell? number of electrons: 3 d electrons 3d electrons How many of those electrons are unpaired? number of unpaired electrons: unpaired electrons

a Mn atom has 5 electrons in its 3d subshell

All those 5 electrons are unpaired.

Explanation:

Step 1 : Data given

Mn = manganese

Manganese has atomic number 25

Step 2: Number of electrons

Since Manganese has atomic number 25, it means it has 25 electrons

It's complete electron configuration is 1s²  2s²  2p⁶  3s²  3p⁶  4s²  3d⁵

3d⁵ = This means a Mn atom has 5 electrons in its 3d subshell.

Since there are 5 orbitals in the 3d, each electron will occupy its own orbital (this is called the Hunds rule).

Before pairing begins, the 3d orbital must be filled parallel first.

This means all those 5 electrons are unpaired.

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