Exam 1

Question 1

What is a pure substance? Can it be separated?

Answer 1

It’s a sinlge thing/matter cannot be separated

Question 2

What is a mixture? Can it be separated?

Answer 2

It’s a combination of 2 or more substances of things and it can be separated

Question 3

What is a heterogeneous mixture and its features?

Answer 3

Has visibly different features, can see the different substances in the mixture

Question 4

What is homogenous mixture and it’s features?

Answer 4

Only has one visible distinct phase (looks all the same thing)

Question 5

What is an element?

Answer 5

A pure substance that can not be broken down (one thing)

Question 6

What is a compound?

Answer 6

Something made up of 2 or more elements and can be broken down

Question 7

What is a diatomic molecule?

Answer 7

A molecule that contains 2 atoms

Question 8

What is a triatomic molecule?

Answer 8

A molecule that contains 3 atoms

Question 9

What is a homoatomic molecule?

Answer 9

A molecule that contains the exact same atoms

Question 10

What is a heteroatomic molecule?

Answer 10

A molecule made up of 2 or more different atoms

Question 11

LOOK AT CHAPTER 1 PRACTICE PROBLEMS AND DO THEM

Answer 11

ANSWER IN YOUR NOTES

Question 12

What are some things that are not matter?

Answer 12

Heat, light, electricity

Question 13

How do you define solid as a state of matter?

Answer 13

definite shape, definite volume

Question 14

How do you define liquid as a state of matter?

Answer 14

no shape, shape of container

Question 15

How do you define gas as a state of matter?

Answer 15

indefinite shape, indefinite volume

Question 16

How do you know if it is a physical reaction or a chemical reaction?

Answer 16

Physical
Color ,Oder ,Physical state ,Its Chemical identity remains the same, Substance changes its physical appearance
But its chemical composition stays the same
No new substance is formed

Chemical
Undergoes or resists change to form a new substance, A new substance is formed

Question 17

What element is this? H

Answer 17

Hydrogen

Question 18

What element is this? He

Answer 18

Helium

Question 19

What element is this? Li

Answer 19

Lithium

Question 20

What element is this? Na

Answer 20

Sodium

Question 21

What element is this? K

Answer 21

Potassium

Question 22

What element is this? Be

Answer 22

Beryllium

Question 23

What element is this? Mg

Answer 23

Magnesium

Question 24

What element is this? Ca

Answer 24

Calcium

Question 25

What element is this? B

Answer 25

Boron

Question 26

What element is this? C

Answer 26

Carbon

Question 27

What element is this? N

Answer 27

Nitrogen

Question 28

What element is this? O

Answer 28

Oxygen

Question 29

What element is this? F

Answer 29

Fluorine

Question 30

What element is this? Ne

Answer 30

Neon

Question 31

What element is this? Al

Answer 31

Aluminum

Question 32

What element is this? P

Answer 32

Phosphorous

Question 33

What element is this? S

Answer 33

Sulfur

Question 34

What element is this? Cl

Answer 34

Chlorine

Question 35

What element is this? Br

Answer 35

Bromine

Question 36

What element is this? I

Answer 36

Iodine

Question 37

What element is this? Ni

Answer 37

Nickel

Question 38

What element is this? Cu

Answer 38

Copper

Question 39

What element is this? Zn

Answer 39

Zinc

Question 40

What element is this? Sn

Answer 40

Tin

Question 41

What element is this? Pb

Answer 41

lead

Question 42

What element is this? Au

Answer 42

Gold

Question 43

What element is this? Ag

Answer 43

Silver

Question 44

What are exact numbers?

Answer 44

ANY number that has no uncertainty with it

Question 45

What are some examples of defined numbers?

Answer 45

There are exactly 12 eggs in a dozen, things that DO NOT have to be measured

Question 46

What are inexact numbers?

Answer 46

ANY number that has a degree of uncertainty or has to be measured

Question 47

What are some examples of inexact numbers?

Answer 47

23.234, 0.0964, ANYTHING that needs a measuring tool

Question 48

How can you tell if a number is a significant figure or not?

Answer 48

ALL NONE zeros (98.765) IF zeros are sandwiched in between two non zero numbers than they are significant figures (7.80097 Leading zeros ARE NOT significant figures (0.0099) IF trailing zeros HAVE a decimal point then they are significant figures (985.000) BUT IF NOT then they are NOT significant figures (987,000)

Question 49

Density = WHAT?

Answer 49

Density = Mass/Volume