Nitrogen, nitrogen, phosphorus, phosphorus, sulfur, potassium, oxygen, hydrogen, carbon, iodine, fluorine, boron and boron.
(2)
Hehe, hehe, iron, lithium lithium beryllium, magnesium magnesium silver.
(3)
Mercury, mercury, gold, silicon, silicon, copper, chlorine, sodium, platinum, platinum, barium and barium.
(4)
Aluminum, aluminum, zinc, zinc, calcium, calcium, manganese, manganese, lead, lead, tin, bromine, bromine in mind.