Unit 2A Review

Question 0

Joule

Answer 0

Kgm^2/s^2

Question 1

Planks Constant

Answer 1

h=6.63x10^-34 J•s (Hz)

Question 2

J•s

Answer 2

J/Hz

Question 3

Hertz

Answer 3

Cycles/sec

Question 4

Speed of light

Answer 4

3.0x10^8 m/s

Question 5

Angstrom (Å)

Answer 5

I m=1x10^10 Å

Question 6

Nanometer (nm)

Answer 6

I m=1x10^9 nm

Question 7

Bohr’s equation for calculating the radius of a shell.

Answer 7

r=(n)^2(0.529Å)/z

Question 8

The constant: z

Answer 8

1

Question 9

Rutherford

Answer 9

Named nucleus; identified the proton

Question 10

Thomson

Answer 10

Identified electron

Question 11

Chadwick

Answer 11

Identified neutron

Question 12

Atomic theory

Answer 12

All matter is made if indivisible particles (atoms). All elements are exactly the same and proportioned exactly.

Question 13

Schrödinger

Answer 13

Proposed that electrons move around a nucleus in a cloud. Created currently accepted atom model.

Question 14

Rutherford

Answer 14

Gold foil experiment.

Question 15

James Chadwick

Answer 15

Discovered the neutron.

Question 16

Lavoisier

Answer 16

Father of Modern Chemistry

Question 17

Dalton

Answer 17

Billiard ball model; Law of Multiple Proportions

Question 18

Proust

Answer 18

Law of definite proportions

Question 19

DeBrogile

Answer 19

Defined relationship between mass and wavelength for electromagnetic radiation; quantum theory; y=h/mv

Question 20

Einstein

Answer 20

Defined the apparent mass of a photon of light with a given wavelength; m=hyc

Question 21

Newton

Answer 21

Proposed the idea of the wave theory of light.

Question 22

Compton

Answer 22

Performed lab experiments that photons do exhibit the apparent mass calculated by Einsteins equation.

Question 23

Schrödinger

Answer 23

Electron cloud model; quantum theory

Question 24

Planck

Answer 24

Quantum theory; E=hv

Question 25

Goldstein

Answer 25

Canal ray, isolated a massive positive charge

Question 26

Millikan

Answer 26

Oil drop experiment; published value of the e charge

Question 27

Bohr

Answer 27

Bright line spectrum of hydrogen; r=n^2(0.529Å)/z

Question 29

Atomic weight

Answer 29

Sum of protons and neutrons

Question 30

Atomic number

Answer 30

of protons & # of electrons in an atom

Question 31

Metals

Answer 31

Usually lose electrons; form positive ions

Question 32

Nonmetals

Answer 32

Usually gain electrons; form negative ions.

Question 46

Isotope

Answer 46

Same # of protons, different # of neutrons