Chapter 2: Atomic Theory

Question 1

Atomic mass #

Answer 1

Average number of isotopes found in nature

Question 2

Proton

Answer 2

Found in nucleus

Question 3

Neutron, ___ subatomic particle

Answer 3

Found in nucleus, heaviest subatomic particle

Question 4

Electron

Answer 4

Found outside of nucleus, lightest subatomic particle

Question 5

Dalton

Answer 5

Father of Atomic Theory

Question 6

Thomson

Answer 6

Discovered electron while using a magnet with a cathode ray tube, plum pudding model.

Question 7

Rutherford

Answer 7

Discovered nucleus is positively charged, atoms are mostly empty space, gold foil experiment

Question 8

Bohr

Answer 8

Put electrons into energy levels

Question 9

Planck

Answer 9

All energy is quantized

Question 10

Millikan

Answer 10

Used the oil drop experiment to determine the negative charge of electron

Question 11

Schrödinger

Answer 11

Quantum mechanics/ electron cloud model. I like the o dots

Question 12

Mendeleev

Answer 12

Father of the periodic table

Question 13

Heisenberg

Answer 13

The uncertainty principle: You can’t determine both the location and velocity of an electron w/out affecting its path or speed

Question 14

Aufbau Principle

Answer 14

Electrons eneter orbitals of lowest energy first

Question 15

Pauli Exclusion Principle (PEP)

Answer 15

An atomic orbital includes at most 2 electrons, and they circle the nucleus in opposite directions

Question 16

Hund’s Rule

Answer 16

When electrons occupy orbitals of the same energy, electrons will enter empty orbitals first.

Question 17

Isotope

Answer 17

Different number of neutrons.

Question 18

Atomic mass

Answer 18

The weighted average of an element’s naturally occurring isotopes

Question 19

Atomic number =

Answer 19

protons

Question 20

Mass number =

Answer 20

protons + neutrons

Question 21

Ion

Answer 21

When an atom gains or loses an electron

Question 22

Electron configuration order

Answer 22

SDPF (bottom one)

Question 23

S

Answer 23

2 electrons max

Question 24

P

Answer 24

6 electrons max

Question 25

D

Answer 25

10 electrons max

Question 26

F

Answer 26

14 electrons max

Question 27

Isotopic notation ___ C ___

Answer 27

Isotopic notation atomic mass C atomic number

Question 28

Protons and neutrons in ___.

Answer 28

NUCLEUS

Question 29

Electrons are ___.

Answer 29

OUTSIDE OF NUCLEUS

Question 30

Cations

Answer 30

Positive ion that's lost 1+ electrons

Question 31

Anions

Answer 31

Negative ion that's gained 1+ electrons