Zero.
It has 4 electrons and thus it's electron configuration is 1s2 2s2. Each s orbital can only hold 2 electrons and since each has 2, there are are no unpaired electrons.
There are no unpaired electrons in strontium.
two
2
5
Beryllium has 4 electrons.
There are many elements which have no unpaired electrons in their outer shells. The Noble gasses all have closed shells of valence electrons. The alkali earth metals (Beryllium, Magnesium, Calcium etc) also have no unpaired electrons, although their outer shell is not entirely full.
There are 3 unpaired electrons.
zero - there are no unpaired electrons
three unpaired electrons
There are no unpaired electrons in strontium.
6 unpaired electrons
A silicon atom has 4 unpaired electrons.
3 unpaired electrons
they're are zero unpaired electrons.
5 unpaired electrons There are 5 unpaired electrons in the Fe3+ ion. The reason for this is that Iron has the electron configuration Ar3d5.
There are 5 unpaired electrons in Fe^3+ in its ground state.
Beryllium has two valence electrons.