click below
click below
Normal Size Small Size show me how
unit six
madalyn's chem review
unit six | |
---|---|
periodic law | when elements are arranged in order of insreasing atomic number, there is a periodic repetition of their physical and chemical properties |
metals | high luster,good conductors of heat and electricity, can reflect light b/c of luster/ sheen, solid at room temp. except for mercury(Hg), malleable and ductile |
nonmetals | poor conductors of heat and electric current. Carbon =exception, solid nonmetals brittle(break when hit w/ hammer) |
metalliod | properties similar to both metals and nonmetals. may behave like either depending on condition |
alkali metals | group 1A see periodic table |
alkaline earth metals | group 2A see periodic table |
halogens | non metals group 7A see peiodic table |
nobel gasses | stable rarely take part in a reaction also called inert gasses group 8A see periodic table |
representative elements | groups 1A-7A disply wide range of physical and chemical properties |
transition metal | metals in which th highest occupied s and nearby d orbitals contain electrons |
inner transition metals | the highest occupied s sublevel and nearby f sublevel generally contain electons |
atomic radius | half the distance between the nuclei of two atoms of the same element when the atoms are joined |
ion | atom or group of atoms that have a positive or negative charge |
cation | ion with a positive charge |
anion | a ion with a negative charge |
ionization energy | energy required to remove an electron from an atom |
electronegativity | the ability of an atom of an element to attract electrons when the atom is in a compound |