What is the molecular formula of the periodic table of chemical elements (with letters)?

Q and qěng hydrogen (h)? , hài helium (He), lǐ lithium (Li), pí beryllium (Be), péng boron (B)?

Carbon (c), nitrogen (n), oxygen (o), fluoriNe (f) and nitrogen (ne)?

Na, Mg, Al, Si and P?

Sulfur, chlorine, argon, potassium and calcium.

Extended data:

In the same period, from left to right, the number of electron layers outside the nucleus of elements is the same, the number of outermost electrons increases in turn, and the atomic radius decreases (except for the zero group elements). The ability to lose electrons is gradually weakened, the ability to gain electrons is gradually enhanced, the metallicity is gradually weakened, and the nonmetal is gradually enhanced.

The highest positive oxidation number of elements increases from left to right (except those without positive valence), and the lowest negative oxidation number increases from left to right (except O and F elements in the first and second periods).

References:

Baidu Encyclopedia-Periodic Table of Chemical Elements