I fell D is the correct answer
The answer is C because of the ionization energy trend
Answer:
Sodium Aluminate
Formula:-

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Melting points and boiling points of some ionic compounds

The number of lone pairs that are most likely found on the central atom is zero. There are no lone pairs found on the central atom.
Answer:
For each scenario as following:
A. 3 Potential deaths by chlorine exposure
B. 1 Potential deaths by chlorine exposure
C. 3 Potential deaths by chlorine exposure
Explanation:
According to Freitag, 1941 Chlorine exposure can be lethal at the concentration of 34-51 ppm in a time of 1h-1.5h. The answers are based on his reference.