Hydrogen, , Helium, , Lithium, , Berllium, , Boron, , Carbon, , Nitrogen , , Oxygen, , Fluorine, , Neon, , Sodium, , Magnesium.

Ilg'orlar ro'yxati

Vizual uslub

Moslamalar

Namunani almashtirish

)
Tahrirlashni davom ettirish: ?