Chem 111 Quiz 1

Front 1

homogeneous

Back 1

same composition throughout

Front 2

heterogeneous

Back 2

different substances that remain physically

separate

Front 3

precision

Back 3

closeness to one another in a series of measurements

Front 4

accuracy

Back 4

how close measured result is to true value

Front 5

uncertainty

Back 5

+- & fill all numbers with zeros and add 5 at the end

Front 6

Cº to K

Back 6

ºC + 273.15

Front 7

K to ºC

Back 7

K - 273.15

Front 8

ºF to C

Back 8

(5/9)(ºF-32)

Front 9

ºC to ºF

Back 9

(9/5)(ºC+32)

Front 10

Density

Back 10

Mass/ Volume

Front 11

Heat

Back 11

Specific heat J/gºC x mass g x T ºC

Front 12

1 kJ

Back 12

1000 J

Front 13

Law of Conversion of Matter

Back 13

When chemical reaction takes place, matter is neither created no destroyed, it just goes from one form to another

Front 14

Law of Constant Composition

Back 14

MULTIPLE samples of any pure chem compound always contain the same percent by mass of ea element making up the compound

Front 15

Atomic number

Back 15

#of protons = # of electrons

Front 16

Mass Number

Back 16

Protons + neutrons

Front 17

anion

Back 17

negative

Front 18

cation

Back 18

positive

Front 19

octet rule

Back 19

elements react to form compounds in such a way as to put 8 electrons in the outermost occupied valence shell

Front 20

Electron configuration

Back 20

1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 4d10,

Front 21

ex

Back 21

tra