Chem Honors 10Th Kim

Front 1

democritus believed that atoms were...

Back 1

indivisible and indestructable.

Front 2

DALTONS ATOMIC THEORY

all elements are composed of _________ particles called _________

Back 2

all elements are composed of INDIVISIBLE particles called ATOMS

Front 3

DALTONS ATOMIC THEORY

atoms of the same element are _________

Back 3

atoms of the same element are IDENTICAL

Front 4

DALTONS ATOMIC THEORY

atoms of different elements can physically mix together or chemically combine in simple __________ ratios to form __________

Back 4

atoms of different elements can physically mix together or chemically combine in simple WHOLE NUMBER ratios to form COMPOUNDS

Front 5

*** IMPORTANT**
DALTONS ATOMIC THEORY

chemical ______ occur when atoms are _______, _______, or _______

Back 5

chemical REACTIONS occur when atoms are SEPARATED, REARRANGED, OR JOINED

Front 6

individual atoms are ___________ with instruments such as _________ tunneling microscope

Back 6

individual atoms are OBSERVABLE with instruments such as SCANNING tunneling microscopes.

Front 7

There are ______ kinds of ______ particles that make up the atom.

Back 7

there are THREE kinds of SUBATOMIC particles that make up the atom.

Front 8

electrons were discovered by ____________

Back 8

electrons were discovered by JJ THOMSON

Front 9

___________ used a _______ ray tube. The electrons were attracted to the __________ charged plate.

Back 9

JJ THOMSON used a CATHODE ray tube. The electrons were attracted to the POSITIVELY charged plate.

Front 10

like charges ________, opposite charges ________.

Back 10

like charges REPEL, opposite charges ATTRACT.

Front 11

The charge of an electron was discovered by ______________

Back 11

the charge of an electron was discovered by ROBERT A. MILLIKAN

Front 12

the mass of an electron is _________ of a _____ atom

Back 12

the mass of an electron is 1/1840 of a hydrogen atom.

Front 13

__________ thought that _______ were evenly distributed throughout an atom filled __________ with positively charged material. it was called the _________ model.

Back 13

JJ THOMSON thought that ELECTRONS were evenly distributed throughout an atom filled UNIFORMLY with positively charged material. it was called the PLUM PUDDING model.

Front 14

is the plum pudding model correct?

Back 14

NO.

Front 15

___________ gold foil experiment disproved _______'s plum pudding model.

Back 15

RUTHERFORD's gold foil experiment disproved THOMSON's plum pudding model.

Front 16

_________'s gold foil experiment stated that most of an atom was made of _______, and that the _______ charge was concentrated in a ________.

Back 16

RUTHERFORD's gold foil experiment stated that most of an atoms was mode of EMPTY SPACE, and that the POSITIVE charge was concentrated in a NUCLEUS.

Front 17

The atomic number is.....

Back 17

the atomic number is the number of protons and electrons in a neutral atom.

Front 18

what letter is the atomic number represented by?

Back 18

the atomic number is represented by the letter Z

Front 19

The mass of the atom depends on the number of _______ and __________

Back 19

The mass of the atom depends on the number of PROTONS and NEUTRONS

Front 20

what letter is the mass number represented by?

Back 20

the mass number is represented by the letter A

Front 21

*** IMPORTANT ***

# of neutrons = ________ - __________

Back 21

# of neutrons = MASS NUMBER - ATOMIC NUMBER

Front 22

the mass number represents......

Back 22

the mass number represents the SUM of the number of PROTONS and NEUTRONS in the nucleus.

Front 23

to calculate the atomic mass.....

Back 23

to calculate the atomic mass, MULTIPLY the mass of EACH ISOTOPE by its NATURAL ABUNDANCE, then ADD the PRODUCTS

Front 24

_______ are protons and neutrons

Back 24

NUCLEONS are protons and neutrons

Front 25

the stability of the atom depends on __________

Back 25

the stability of the atom depends on THE PROTON tO NEUTRON RATIO.

Front 26

__________ __________ is the like charges repelling each other

Back 26

ELECTTROSTATIC REPULSION is the like charges repelling each other.

Front 27

______ _____ _____ is a force that actos on subatomic particles that are extremely ______. It overcomes ________ _______ between ________.

Back 27

STRONG NUCLEAR FORCE is a force that acts on subatomic particles that are extremely CLOSE. it overcomes ELECTROSTATIC REPULSION between PROTONS

Front 28

as atomic number ________, more _____ are needed to produce _________ _______ _______

Back 28

as atomic number INCREASES, more NEUTRONS are needed to produce STRONG NUCLEAR FORCE

Front 29

band of stability is a region on a graph which all stable ________ are found when plotting the number of ______ vs. the number of _______

Back 29

line of stability is a region on a graph which all stable NUCLEI are found when plotting the number of NEUTRONS vs. the number of PROTONS.

Front 30

a positron is......

Back 30

a positron is a particle with the SAME mass as an electron, but a DIFFERENT charge.

Front 31

Positron emission is....

Back 31

positron emission is when a PROTON is convereted to a NEUTRON

Front 32

_______ ______ occurs when the ______ draws in an electron.

Back 32

ELECTRON CAPTURE occurs when the NUCLEUS draws in an electron.

Front 33

positron emission decreases the # of _________ by __

Back 33

positron emission decreases the # of PROTONS by ONE

Front 34

what does electron capture produce?

Back 34

an elecctron capture produces a NEUTRON

Front 35

during electron capture, the ___________ ______ decreases by ___

Back 35

during electron capture, the ATOMIC NUMBER decreases by 1.

Front 36

what is the Radioactive Decay Series?

Back 36

it is a series of nuclear reactions that start with an unstable nucleus and end with a stable nucleus.

Front 37

substances that spontaneously emit radiation are called ________

Back 37

substances that spontaneously emit radiation are called RADIOACTIVITY

Front 38

rays and particles emitted by radioactive material are called _________

Back 38

rays and particles emitted by radioactive material are called RADIATION

Front 39

alpha radiation deflect toward the __________ charged plate

Back 39

alpha radiation deflect toward the NEGATIVELY charged plate

Front 40

alpha particles contain two __________ and two _________

Back 40

alpha particles contain two PROTONS and two NEUTRONS

Front 41

alpha particles have a ______ charge

Back 41

alpha particles have a +2 charge

Front 42

beta particles are deflected toward the __________ charged plate

Back 42

beta particles are deflected toward the POSITIVELY charged plate

Front 43

beta particles are fast _____ ____ with a _____ charge

Back 43

beta particles are fast MOVING ELECTRONS with a -1 charge

Front 44

gamma rays are _____ energy radiation that possess ____ mass.

Back 44

gamma rays are HIGH energy radiation that possess NO mass.

Front 45

gamma rays have _____ charge.

Back 45

gamma rays have NO charge.