actinide series

part of the transition metals
bottom row of pull-out
mostly synthetic
F block

alkali metals

grp 1
1 valence e-
+1 charge
S block

alkaline earth metals

grp 2
2 valence e-
+2 charge
S block

allotropes

compound with same chemical make-up but different geometric crystal shapes
ie: diamond, coal, graohite

aqueous

dissolved in water

soluble

atomic mass

mass of 1 mole of element

atomic number

# protons in nucleus

atomic radius

distance from center of nucleus to outer edge of electron cloud

periodic property

atomic symbol

element symbol on periodic table

brittle

easily breaks

charge/ oxidation #

# electrons that an element gives away or steals
(-) steals e- or (+) gives e-

chemical change

A change in matter that produces one or more new substances

chemical formula

A combination of chemical symbols and numbers to represent a substance

chemical symbol

one or two letter representation of an element

compound

A substance made up of atoms of two or more different elements joined by chemical bonds

conductor

A material that conducts heat and electricity well

density

physical property
mass divided by volume

diatomic

Containing only two atoms.

electronegativity

pull of electrons

periodic property

element

A pure substance made of only one kind of atom

family

columns going up and down the periodic table
also called: group

group

columns going up and down the periodic table
also called: family

halogens

grp 17
7 valence e-
-1 charge
P block

inert

stable and unreactive

ion

A charged atom

ionization energy

the energy required to remove an electron from an atom

periodic property

lanthanide series

part of the transition metals
top row of pull-out
F block

Law of Conservation of Mass

Matter cannot be created or destroyed, just rearranged

malleable

capable of being shaped

melting point

The temperature at which a solid becomes a liquid

metalloids

Elements touching the staircase

elements with a mixture of metallic and nonmetallic properties

metals

elements on the left side of the periodic table

non-metals

elements on the right corner of the periodic table

noble gases

grp 18
inert family

organic

contains carbon

periodic

recurring pattern

period

rows going across the periodic table

transition metals

grp 3-12
usually 2, 3, or 4 valence e-
usually +2, +3, or +4 charge
D block

phase change

a change in the state of matter
ie freeze, evaporation, sublimination

physical Properties

A characteristic of a pure substance that can be observed without changing it into another substance.

radioactive

The breakdown or decay of a element, releasing harmful particles and energy

salt

ionic compound

metal bonded to a mon-metal

semi-conductors

metalloids are often _____ that will only conduct electricity under certain conditions.

soluble

dissolves in water

aqueous

tarnish

discoloration of metal surface caused by oxidation

tetra-

prefix meaning 4

Boron Group

grp 13
3 valence e-
+3 charge
P block

Carbon Group

grp 14
4 valence e-
M +4/ NM -4 charge
P block

Nitrogen Group

grp 15
5 valence e-
-3 charge
P block

Oxygen Group

also called Chalcogen
grp 16
6 valence e-
-2 charge
P block

ductile

a metal that can be easily pulled into wires

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