Chemistry Atomic Theory

Front 1

smallest particle of an element that retains the properties of that element.

Back 1

atom

Front 2

discovered that atom # [protons] gives identity of atom

Back 2

Moseley

Front 3

atomic #= # of ______

Back 3

protons

Front 4

atomic mass= # of ______ + ______

Back 4

protons
neutrons

Front 5

to find # of neutrons = atomic mass - _______ =

Back 5

atomic #

Front 6

atom with a charge

Back 6

ion

Front 7

positively charged
by losing electrons

Back 7

cations

Front 8

negatively charged
gains electrons

Back 8

anions

Front 9

atoms with the same # of protons but diff # of neutrons

Back 9

isotopes

Front 10

symbol for each element found on the periodic table

Back 10

atomic symbol

Front 11

low energy state where you can initially find electrons.

Back 11

ground state

Front 12

when energy is added to the atom, the electrons ma use this energy to jump into a higher-energy state

Back 12

excited stage

Front 13

every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.

Back 13

Hund's rule

Front 14

no two electrons in an atom can have the same four quantum numbers

Back 14

Pauli exclusion principle

Front 15

a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents

Back 15

quantum theory

Front 16

change the composition of an atoms nucleus

Back 16

nuclear reactions

Front 17

_____,_____,_____ readtion are all produced by nuclear reactions

Back 17

alpha
beta
gamma

Front 18

most atoms have a stable___

Back 18

nuclei

Front 19

force overcoming repulsion between protons

- neutrons also help the force "glue" holding nucleus together.

Back 19

strong nuclear force

Front 20

elements greater than __ are not stable

Back 20

83

Front 21

change the composition of an atoms nucleus

Back 21

nuclear reactions

Front 22

_____,_____,_____ readtion are all produced by nuclear reactions

Back 22

alpha
beta
gamma

Front 23

most atoms have a stable___

Back 23

nuclei

Front 24

force overcoming repulsion between protons

- neutrons also help the force "glue" holding nucleus together.

Back 24

strong nuclear force

Front 25

elements greater than __ are not stable

they are

Back 25

83

radioative

Front 26

elements 1- __- protons = neutrons, but need increasingly more ___ to hold together

Back 26

20

neutrons

Front 27

alpha's identity

Back 27

4
A
2

Front 28

alpha charge

Back 28

+2

Front 29

alpha's penetrating ability

Back 29

low, stopped by paper

Front 30

beta's identity

Back 30

0
B
-1

Front 31

beta's charge

Back 31

-1

Front 32

beta's penetrating ability

Back 32

medium stopped by heavy clothing

Front 33

gamma identity

Back 33

high energy

non particle
radiation
o

Front 34

gamma charge

Back 34

0

Front 35

gamma penetrating ability

Back 35

high stopped by cod?

Front 36

sponataneios breakdown of an unstable atomuc nucleus during which alpha,beta and gamma particles may be emitted.

Back 36

radioactive decy

Front 37

keeps track of the radiation's components in decay

Back 37

nuclear equation

Front 38

form of energy consisting of waves

Back 38

electromagnetic radiation

Front 39

what are some examples of electromagnetic radiation

Back 39

macrowaves
radiowaves
gamma waves
x rays

Front 40

distance between successive crests or troughs

measurement _______

Back 40

wavelength


nanometers

Front 41

height of the wave
brightness or intensity depends on this

Back 41

amplitude

Front 42

how fast your wave is oscillating measured in cycles per second

[ s -1 or ____]

Back 42

frequency

hertz

Front 43

speed of light

Back 43

3.00 x 10^8 m/s