Correct: carbon, oxygen, sulfur, hydrogen, helium, nitrogen, silicon, chlorine, bromine, Incorrect: iron, copper, magnesium, sodium, potassium, platinum, gold, lithium, calcium, aluminium, tin, zinc, caesium, mercury, lead,

TOL 4-level Metals and non-metals

Papan Peringkat

Gaya visual

Pilihan

Berganti templat

Pulihkan simpan otomatis: ?