Metals, Metalloids, and Nonmetals

Vocabulary

acid anhydride

oxide that forms an acid in water

alkali metal

element (except hydrogen) in group 1 of the periodic table

alkaline earth metal

element in group 2 of the periodic table

allotrope

one of the possible physical forms in which an element can exist

amorphous solid

solid composed of particles that are not organized into a crystalline pattern

base anhydride

oxide that forms a base in water

borate

ion with boron-oxygen bonds

carbonate

substance with the carbonate ion, CO32–

disproportionation reaction

reaction in which the element is both reduced and oxidized

Haber-Bosch process

process that breaks down the nitrogen-nitrogen bonds in N2 and converts nitrogen into ammonia (NH3)

halogen

element in group 17 of the periodic table

hydrogen carbonate

substance with the HCO3 ion

hydrogenation

reaction in which hydrogen is added to a compound

interhalogen

compound that consists of more than one halogen element, such as ClF or IF5

main group element

element in group 1, 2, or 13 to 18 of the periodic table

metal

one of a class of elements that tend to have a metallic luster, be good conductors of electricity and thermal energy, and be malleable and ductile

metalloid

one of a class of elements that tend to have properties of both metals and nonmetals

nitrogen fixation

process of breaking down N2 into more usable nitrogen compounds

noble gas

element in group 18 of the periodic table

nonmetal

one of a class of elements that tend to not have metallic luster, be poor conductors of electricity and thermal energy, and be neither malleable nor ductile

passivation

process of making a material less reactive by coating it or letting the top layer react often with oxygen in the air

peroxide

compound that has an oxygen-oxygen bond in which the oxidation state of oxygen is –1

polymorph

solid material with more than one possible structure

silicate

mineral that contains both silicon and oxygen

transition metal

element in group 3 through 12 of the periodic table