Match the elements with their symbols. 1 . oxygen gas o 2 . gold s 3 . iron au 4 . oxygen atom o 2 5 . sulfur fe 6 . calcium ca 7 . lead n 8 . nitrogen gas n 2 9 . nitrogen atom pb

Some of these are found straight from the periodic table, but some of them it is just easier to memorize.

Oxygen is gaseous form is .

Gold is Au.

Iron is Fe.

Oxygen atom is O, because we are not talking about it in the gaseous state.

Sulfur is S.

Calcium is Ca.

Lead is Pb.

Nitrogen gas is , for the same reason as oxygen gas.

Nitrogen atom is N, for the same reason as oxygen atom.

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.