Book 2 test

Question 1

Buoyancy

Answer 1

upward force of a liquid on an object

Question 2

water

Answer 2

H2O

Question 3

John Dalton

Answer 3

developed atomic theory

Question 4

Atom

Answer 4

basic unit of matter

Question 5

Mass

Answer 5

amount of matter in an object

Question 6

Inner energy level

Answer 6

1

Question 7

concrete

Answer 7

mixture

Question 8

chemical property

Answer 8

ability to react

Question 9

Volume

Answer 9

Length x width x height

Question 10

true or fasle
compounds are forms of matter that contain two or more elements

Answer 10

true

Question 10

Neils Bohr

Answer 10

drew the first picture of the atom

Question 11

true or false
Density is the amount of mass per unit volume

Answer 11

true

Question 12

true or false
water freezes at 32 degrees on the Celsius scale

Answer 12

false

Question 13

true or false
the neutron has no electrical charge

Answer 13

true

Question 14

true or false
protons travel in orbits around the nucleus

Answer 14

false

Question 15

true or false
sand is made up of atoms of one kind

Answer 15

false

Question 16

true or false
atomic orbits have a maximum of 7 principal energy levels

Answer 16

true

Question 17

true or false
all matter is made up of small particles called atoms

Answer 17

true

Question 18

true or false
when gas molecules are heated up, gas pressure decreases

Answer 18

false

Question 19

true or false
all gases are composed of matter

Answer 19

true

Question 20

an example of a compound is

Answer 20

salt

Question 21

the elements of the periodic table are arranged according to their

Answer 21

atomic number

Question 22

the atomic mass is a measure of

Answer 22

protons plus

Question 23

the periodic table discussed in this unit shows _______ elements

Answer 23

103

Question 24

a form of matter that has definite volume but no definite shape is a _________

Answer 24

liquid

Question 25

yes or no? electricity is matter

Answer 25

no

Question 26

yes or no sugar is matter

Answer 26

yes

Question 27

yes or no heat is matter

Answer 27

no

Question 28

yes or no light is matter

Answer 28

no

Question 29

yes or no corn is matter

Answer 29

yes

Question 30

yes or no sound is matter

Answer 30

no

Question 31

yes or no air is matter

Answer 31

yes

Question 32

yes or no water is matter

Answer 32

yes

Question 33

yes or no gravity is matter

Answer 33

no

Question 34

yes or n dirt is matter

Answer 34

yes

Question 35

yes or no star plasma is matter

Answer 35

yes`

Question 36

what is the atomic mass for Na ( sodium)?

Answer 36

23 or 22.991

Question 37

what is the atomic number for Na ( sodium)

Answer 37

11

Question 38

How many neutrons does sodium have?

Answer 38

12

Question 39

What is the chemical symbol for sodium?

Answer 39

Na

Question 40

How many protons does sodium have?

Answer 40

11

Question 41

How many electrons does sodium have in the 2nd energy level?

Answer 41

8

Question 42

how many total number of atoms are in the formula NH3

Answer 42

4

Question 43

How many total number of atoms are in the formula CaCO3

Answer 43

5

Question 44

How many total number of atoms are in the formula SiO2

Answer 44

3

Question 45

How many total number of atoms are in the formula NaCl

Answer 45

2

Question 46

How many total number of atoms are in the formula H2O

Answer 46

3