Hon Chem - Ch 6 Vocab

alkali metal

group 1 elements

alkaline earth metal

group 2 elements

anion

an ion with a negative charge

atomic radius

½ the distance between the nuclei of 2 atoms of the same element when the atoms are joined

cation

an ion with a positive charge

electronegativity

the ability of an atom to attract electrons when the atom is in a compound

halogen

group 17 elements

inner transition metal

the bottom 2 rows (below the main body of the Periodic Table)

ion

an atom that has a charge

ionization energy

energy required to remove an electron from an atom

metalloid

has properties similar to those of metals and nonmetals

metal

an element that is a good conductor of heat and electric current

noble gas

group 18 elements

nonmetal

an element that is a poor conductor of heat and electricity

periodic law

when elements are arranged in order of increasing atomic number, there is a periodic repetition of their properties

representative element

groups 1, 2, 13-18 (the s & p sections of the Periodic Table)

transition metal

groups 3 though 12 elements