General chemistry

General chemistry

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General chemistry

argon

Chemistry; General chemistry

A chemical element represented by the symbol Ar. Argon has atomic number 18 and is the third element in group 18 of the periodic table. Argon is the third most common gas in the Earth's atmosphere.

potassium

Chemistry; General chemistry

The chemical element with the symbol K, and atomic number 19. Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water, generating ...

The chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40. 078 amu. Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the ...

scandium

Chemistry; General chemistry

A chemical element with symbol Sc and atomic number 21. A silvery-white metallic transition metal, it has historically been sometimes classified as a rare earth element, together with yttrium and the ...

titanium

Chemistry; General chemistry

A chemical element with the symbol Ti and atomic number 22. It has a low density and is a strong, lustrous, corrosion-resistant (including sea water, aqua regia and chlorine) transition metal with a ...

vanadium

Chemistry; General chemistry

A chemical element with the symbol V and atomic number 23. It is a hard, silvery gray, ductile and malleable transition metal.

chromium

Chemistry; General chemistry

A chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point.