1.Which diatomic molecule below would be useful in saying good-bye?
O2
N2
I2
Ta2
Li2
2.Which element is best for use in flash bulbs?
Mn
Mg
Cs
Ca
Sr
Magnesium is often used in old time flash bulbs, if they still exist.
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I have no idea on the first.
TaTa?
O2 for the first one!