Based on the periodic table shown above, elements in which of the following groups have the greatest density?
a.
group 18
b.
group 17
c.
group 15
d.
group 12

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

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The total number of nucleons