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100

absolute zero in Kelvin and Celsius

0 K and -273.15 C

100

simplest repeating unit in a cell

unit cell

100

heat required to cause a unit rise in the temperature of a unit mass of a given substance

specific heat

200

property that is used to predict whether a bond is primarily ionic or primarily covalent

electronegativity

200

the particle of the three main particles that has a negative charge

electrons 

200

covalent bind in which the bonding electron pair is pulled closer to the more electronegative element

polar bond

300

term that refers to a very hard substance that contain covalent binds but do not consist of discrete molecules

covalent networks 

300

a molecules of CO2 in which polar bonds point symmetrically in opposite directions is 

nonpolar

300

the arrangement of atoms in a crystal that has the least empty space of any cubic arrangement

face centered

400

causes brightly coloured lines in the spectrum of glowing hydrogen gas

electrons dropping form higher to lower levels 

400

category that has fluorine bromine and iodine

halogens 

400

type of chemical formula that is the simplest ratio of atoms in a compound

empirical formula 

500

type of geometry that hydrogen selenide (H2Se) which has two bonding pairs and two nonbinding pairs of electrons around the central atom

angular

500

type of geometry that acetone (CH2O) which has three bonding pairs of electrons that are arrayed around the central atom

trigonal planar

500

category that has the elements boron silicon and germanium 

semimetals 

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