General Chemistry Exam 1

Front 1

Substance

Back 1

Has definite composition and distinct properties

Ex. Salt,iron,water

Front 2

Mixture

Back 2

Combination of 2 or more substance which each retains identity

Front 3

Homogenous mixture

Back 3

Composition of mixture is uniform throughout

Front 4

Heterogeneous mixture

Back 4

Composition not uniform

Front 5

Mass

Back 5

measure of amount of matter in an object or sample

Front 6

angstrom

Back 6

1x10E-10

Front 7

Accuracy

Back 7

how close measurement is to true value

Front 8

Precision

Back 8

how close series of replicate measurements are to one another

Front 9

Becquerel

Back 9

Found radioactivity , the spontaneous decay of atoms, uranium.

Front 10

Millikan Oil Drop Experiment

Back 10

Oil was suspended between "+" and "-" plates.
Particle multiples of -1.602E-19C

Used to determine mass of electron with charge to mass ratio found in Cathode Ray tube, 9.109E-31kge-

Front 11

Mass Spectrometry

Back 11

Carbon is standard 12 (amu). With test depending how far they fell from carbon the atomic mass unit (amu) was determine.

Front 12

e-

Back 12

9.109E-31

Front 13

p

Back 13

1.672E-27

Front 14

A/Z X

Back 14

A=mass #=#p+#n

Z=Atomic number=#protons

X=element symbol

Front 15

Average atomic mass

Back 15

(abundance)(Isotope mass)+(abundance)(Isotope mass)

Front 16

Nuclear Stability

Back 16

major factor is neutron-to-proton ratio

more with even numbers

all with atoms less than 83 are radioactive

all isotopes of Te and Pm are radioactive

Front 17

Moles to gram

Back 17

mole x (g/mole) =grams

Front 18

Grams to Mole

Back 18

(grams) x (mole/molar mass(g))

Front 19

Mole to Particle

Back 19

(Mole) x (6.022E-23/mole)

Front 20

Particle to Mole

Back 20

(particle) x (mole/6.022E-23)

Front 21

1 amu

Back 21

1.661E-27

Front 22

1 Joule

Back 22

=Kgm^2s^-2

SI unit for energy

Front 23

Young's Double Slit Experiment

Back 23

light has wave like characteristics

Front 24

Wavelength

Back 24

distance between identical points

Front 25

Frequency

Back 25

number of waves that pass through particular point in 1 second

Front 26

Amplitude

Back 26

vertical distance from mid-line of wave to top

Front 27

Speed of light

Back 27

wavelength in meters x frequency in seconds

Front 28

Energy

Back 28

=Frequency x Plank constant (h) (6.626E-34)

Front 29

Line Spectrum/Rydberg equation

Back 29

1/wavelength of a line in spectrum= Rydberg constant (1.097E7m-1) x ((1/final^2) - (1/initial^2))

Front 30

1 electrovolt (ev)

Back 30

= 1.602E-19 J