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Give the number of unpaired electrons present in a ground-state atom of Tl.

I got 5, which isn't right.

ndicate which species in each pair has the higher ionization energy.
Choose at least one answer.
a. Between K and I, I
b. Between K and I, K
c. Between Al and Al+, Al
d. Between Al and Al+, Al+
e. Between Ar and Cl-, Ar
f. Between Ar and Cl-, Cl-
g. Between Mg and Ca, Mg
h. Between Mg and Ca, Ca

I got a,c,e,f,g but i only got .25/1 right. I thought I got this because all you have to do is follow what the periodic table pattern says, but I keep getting it wrong so any help is appreciated!

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