Question

Which of these atoms and ions has the most unpaired electrons?
Fe3+
Cr2+
Ti
Ni2+
Ti2+

Answer 1

Write the electron configuration for all of it.
Remember that a +2 charge means 2 less electron
Electron configuration for transition metal in oxidation state would not include the s orbital.

Answer 2

And you'll see how much unpaired electron each will have.

Answer 3

for this you'll actually have to write out the electron configuration for each do you know how to do this?

Answer 4

@clara1223