Elementlar

Vodorod (Hydrogenium), H—[[Mendeleyev davriy sistemasi]]ning birinchi guruhiga mansub kimyoviy element; atom massasi 1,00797. Odatdagi sharoitda

Geliy (lot. Helium), He—[[Mendeleyev davriy sistemasi]]ning sakkizinchi guruh kimyoviy elementi, tartib rakami 2, atom massasi 4,0026, rangsiz v

Litiy (lito... va lot Lithium), Li — Mendeleyev davriy sistemasining 1 guruhiga mansub kimyoviy element. Tartib raqami 3, atom massasi 6,941, is

Bor - unsurlar davriy jadvalining 5 unsuri, nimmetall. Bor (lot. Borum), V — Mendeleyev davriy sistemasi III guruhiga mansub kimyoviy element. T

Uglerod (lot. Carbo — kumir, lot. Carboneum), S — Mendeleyev davriy sistemasining IV guruhiga mansub kimyoviy element. Tartib rakami 6, at

Azot (lot. Nitrogenium), N — Mendeleyev davriy sistemasining V guruhiga mansub kimyoviy element. Tartib raqami 7, atom massasi 14,0067. Yer