Hydrogen is hydrogen, oxygen is oxygen, sodium is sodium, and sulfur is sulfur. The next formula should be complete.

The complete version of this element formula is:

H is hydrogen, O is oxygen, Na is sodium and S is sulfur.

C is carbon, p is phosphorus, and the symbol of potassium is old K.

N is nitrogen, F is fluorine, I is iodine and B is boron.

Magnesium, magnesium, silver, silver, mercury, silicon and silicon.

Chlorine, aluminum, barium, calcium.

Lead, lead, platinum, platinum, gold, iron and iron

Zinc, zinc, bromine, helium, helium, neon, neon and argon.

Extended data:

1, valence formula of common elements:

Monovalent potassium sodium silver hydrogen chloride;

Bivalent calcium, barium, magnesium and zinc oxide;

Trivalent, pentavalent, nitrogen, phosphorus and trivalent aluminum; ?

Copper and mercury, one, two, iron, two, three; ?

Tetravalent carbon of divalent, tetravalent and hexavalent sulfur;

Many elements have valence changes,

Different conditions, different prices.

2, common atomic group (root) chemical valence formula:

Monovalent nitrate hydroxide;

Bivalent sulfate carbonate;

Trivalent ordinary phosphate;

Ammonium is usually removed at a negative price.