Quiz 1 Unit 2

Question 1

Atom

Answer 1

Smallest unit of an element that retains the properties of that element

Question 2

Protons

Answer 2

P+, determine the type of atom, +1 charge, 1 amu, inside nucleus, 1 relative mass

Question 3

Neutrons

Answer 3

n0, change mass in isotopes, 0 charge, 1 amu, inside nucleus, 1 relative mass

Question 4

Electrons

Answer 4

e-, changes charge for ions, -1 charge, 0 amu, outside nucleus, 1/840 relative mass

Question 5

Nucleus

Answer 5

Contains almost all the mass of an atom

Question 6

Electron Cloud

Answer 6

Contains almost all the volume of an atom

Question 7

Atoms are Measured in

Answer 7

Picometers or 10^-12 meters

Question 8

Density of Nucleus

Answer 8

Huge

Question 9

Elements Are

Answer 9

Atoms with the same number of protons, or same atomic number

Question 10

Atomic Number is Represented By

Answer 10

Z = #p

Question 11

Hyphen Notation

Answer 11

Element, hyphen, mass number

Question 12

Charge

Answer 12

Protons minus electrons or

Question 13

Electrons are Arranged in

Answer 13

Energy levels called shells or orbits

Question 14

Formula for Bohr Model

Answer 14

2n^2 when n=the shell number

Question 15

Valence Electrons

Answer 15

Electrons found on the farthest energy level of an atom

Question 16

Columns in Periodic Table

Answer 16

Also called groups or families, the number of valence electrons

Question 17

Rows in Periodic Table

Answer 17

Also called periods, the number of energy levels

Question 18

Phil Model

Answer 18

2, 8, 8, 2 for amount of electrons in energy levels

Question 19

Duet

Answer 19

Only applies to helium, lithium, hydrogen, and beryllium (he has little booty)

Question 20

Octet

Answer 20

Electrons are most stable in groups of eight

Question 21

Atomic Number

Answer 21

Number of protons, number of electrons in a neutral atom

Question 22

Mass Number

Answer 22

Sum of protons and neutrons

Question 23

Nuclear/Isotopic Symbol

Answer 23

Mass number on top, atomic number is bottom

Question 24

Finding Counts

Answer 24

Protons is bottom, electrons is bottom, neutrons is top minus bottom

Question 25

Using Periodic Table

Answer 25

Whole number is atomic number, decimal is average atomic mass

Question 26

Average Atomic Mass Rounded

Answer 26

Mass Number

Question 27

Ions

Answer 27

Changes in charge or electrons

Question 28

Isotopes

Answer 28

Changes in mass or neutrons

Question 29

First Number in Hyphen Notation

Answer 29

Atomic Number

Question 30

John Dalton

Answer 30

1) Number three
2) Tested gasses
3) Father of atomic theory
4) An atom is made of sold, indivisible particles with elements being the same. Compounds are ratios and matter can not be created, destroyed, or changed
5) Ball

Question 31

Democritus

Answer 31

1) Number one
2) Solid, indivisible particles (atomos)

Question 32

Aristotle

Answer 32

1) Number two
2) Fire, water, earth, and air

Question 33

JJ Thompson`

Answer 33

1) Number four
2) Used a cathode ray rube, positive and negative charges or anodes/cathodes, also sued magnetic field
3) Electrons are scattered through an atom in a positively charged cloud, also negatively charged particles in an atom (positive surrounding negative)
4) Cookie

Question 34

Rutherford

Answer 34

1) Number five
2) Used alpha particles at a thin sheet of gold foil
3) Protons and electrons are not evenly dispersed, protons are in center and electrons are around
4) Big center

Question 35

Cathode/Anode

Answer 35

Negative/positive electrode

Question 36

Alpha Particles

Answer 36

Positively charged particles that represent a helium nucleus

Question 37

Millikan

Answer 37

1) Number six
2) Used a drop of oil and electric field to stop the oil from dropping
3) Determined charge of an electron and smallest quantized charge

Question 38

Bohr

Answer 38

1) Number seven
2) Electrons orbit around nucleus and do not spiral inward, atoms radiate energy when going to a higher orbit and absorb energy when going to a lower orbit
3) Solar system

Question 39

Quantum Mechanical Model

Answer 39

1) Particles and waves, no way of knowing how it travels but instead in cloud
2) Mathematical model that predicts the probability of electron locations and paths within an electron cloud