Atoms

Question 1

What is Dalton’s Atomic Theory?

Answer 1

1) matter is made up of atoms
2) atoms can’t be created, destroyed, or transformed into other atoms
3) all atoms of an element are the same
4) atoms combine in whole number ratios to form compounds

Question 2

What are subatomic particles?

Answer 2

smaller than atoms

Question 3

What is matter made up of?

Answer 3

atoms

Question 4

What is a proton?

Answer 4

positive (larger mass)

Question 5

What is an electron?

Answer 5

negative

Question 6

What is the Wave Theory of Strollinger?

Answer 6

standing wave in circular motion

Question 7

What is the Plum Pudding Model?

Answer 7

Created by Thomson
negatively charged electrons are embedded in a positively charged “soup”

Question 8

What is the Planetary Model?

Answer 8

Created by Bohr
electrons orbiting in a nucleus of an atom in a fixed, circular path (like how planets orbit the sun)

Question 9

What is the Rutherford Gold Foil Experiment?

Answer 9

alpha particles fired at gold foil
revealed that some particles passed through foil with little deflection
some bounced in different angles

Question 10

What did the Rutherford Gold Foil Experiment conclude about the nucleus?

Answer 10

it is a small, dense positively charged center

Question 11

What are alpha particles?

Answer 11

positively charged particles

Question 12

Where is the nucleus and what is is made up of?

Answer 12

center of atom
protons and neutrons

Question 13

What is outside of the nucleus made up of?

Answer 13

electrons

Question 14

What is a neutral atom?

Answer 14

protons = # electrons

Question 15

What is an ion?

Answer 15

protons ≠ # electrons

Question 16

What is an anion?

Answer 16

negatively charged ion

Question 17

What is a cation?

Answer 17

positively charged ion

Question 18

What is the Atomic Theory?

Answer 18

all matter is composed of elements

Question 19

What is an element?

Answer 19

substance composed of atoms with same # of protons

Question 20

What are isotopes?

Answer 20

equal # of protons, different # of neutrons

Question 21

What statement is false?
Atom #1: 8p+, 8e-, 7 neutrons
Atom #2: 8p+, 6e-, 7 neutrons
Atom #3: 7p+, 6e-, 7 neutrons

1) atoms #1 and #2 are the same
2) atom #1 is neutral, atoms #2 and #3 are ions
3) atoms #1 and #2 are different isotopes
4) atoms #2 and #3 are different elements

Answer 21

3

Question 22

What is the charge of an electron?

Answer 22

-1.602x10^-19

Question 23

What is the unit charge of an electron?

Answer 23

1-

Question 24

What is the mass (amu) of an electron?

Answer 24

0.00055

Question 25

What is the charge of a proton?

Answer 25

1.602x10^-19

Question 26

What is the unit charge of a proton?

Answer 26

1+

Question 27

What is the mass (amu) of a proton?

Answer 27

1.00727

Question 28

What is the charge of a neutron?

Answer 28

0

Question 29

What is the unit charge of a neutron?

Answer 29

0

Question 30

What is the mass (amu) of a neutron?

Answer 30

1.00866

Question 31

What is the atomic mass unit (amu)?

Answer 31

protons and neutrons have 1 amu
electrons have negligible amu

Question 32

How many grams is 1 amu?

Answer 32

1.6605x10^-24 g

Question 33

What is the atomic number?

Answer 33

of protons

Question 34

What is the mass number?

Answer 34

of protons + # of neutrons

Question 35

Do atoms have different mass than neutral atoms?

Answer 35

no

Question 36

What is atomic mass?

Answer 36

weighted average of all isotopes

Question 37

How many isotopes does carbon have?

Answer 37

3

Question 38

What is the mass of a proton (kg)?

Answer 38

1.67x10^-27 kg

Question 39

What is the mass of an electron (kg)?

Answer 39

9.11x10^-31 kg

Question 40

What are the units of a J?

Answer 40

kg x m^2 / s^2