Question

Total number of non metal?

Answer 1

Dear student,

In chemistry, a nonmetal (or non-metal) is a chemical element that mostly lacks metallic attributes.

Physically, nonmetals tend to have relatively low melting and boiling points, and densities, are mostly brittle if solid, and are usually poor conductors of heat and electricity; chemically, they tend to have relatively high ionization energy, electron affinity, and electronegativity values, and gain or share electrons when they react with other elements or compounds.

Number of non metals in periodic table

Seventeen elements are generally classified as nonmetals; most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon); one is a liquid (bromine), and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine).

Metalloids such as boron, silicon and germanium are sometimes counted as nonmetals.

Regards