Potassium atoms contribute one eletron to metallic bonding, but calcium atoms contribute two eletrons .Explain which metal is likely to be harder

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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.