First 25 elements of the periodic table

Hydrogen H

Helium He

Lithium Li

Beryllium Be

Boron B

Carbon C

Nitrogen N

Oxygen O

Fluorine F

Neon Ne

Sodium Na

Magnesium Mg

Aluminum Al

Silicon Si

Phosphorus P

Sulfur S

Chlorine Cl

Argon Ar

Potassium K

Calcium Ca

Scandium Sc

Titanium Ti

Vanadium V

Chromium Cr

Manganese Mn