What are formulas for oxides of the first 20 elements of the periodic table? PLEASE ANSWER FAST AS IT IS VERY IMPORTANT.........

1) Hydrogen monoxide = H2O
2) Helium is an inert element.
3) Lithium oxide = Li2O
4) Beryllium oxide = BeO
5) Many oxide of boron are formed such as Boron trioxide (B2O3) and Boron monoxide (B2O) .
6) Carbon monoxide = CO and carbon dioxide = CO2
7) Nitrogen = NO2
8) Oxygen
9) Fluorine
10) Neon
11) Sodium oxide = Na2O
12) Magnesium oxide = MgO
13) Aluminium oxide = Al2O3
14) Silicon dioxide = SiO2
15) Phosphorous trioxide = P2O3 and phosphorous pentaoxide = P2O5
16) Sulphur dioxide = SO2
17) Chlorine dioxide = ClO2
18) Argon
19) Potassium oxide = K2O
20) Calcium oxide = CaO

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