Chemistry

Question 1

_______’s results are NUMERICAL

Answer 1

Quantitative

Question 2

______’s results are made by using the senses

Answer 2

Qualitative

Question 3

What value tells us the number of protons in an atom of an element?

Answer 3

Atomic #

Question 4

What category are born and silicon in on the periodic table?

Answer 4

Metalloids

Question 5

Which of the following represents a compound: F2, Br2, NO, Ca

Answer 5

NO

Question 6

What is matter?

Answer 6

Anything that has mass and takes up space

Question 7

What is a physical property?

Answer 7

A characteristic of a substance that can be measured and observed without changing identity of substance (qualitative/quantitative)

Question 8

Change of state is a __________ physical property.

Answer 8

Qualitative

Question 9

Viscosity is a _______ physical property

Answer 9

Quantitative

Question 10

What is sublimation?

Answer 10

Changing from a solid to a gas

Question 11

Ductility is a _________ physical property

Answer 11

Quantitative

Question 12

Hardness is a ________ physical property

Answer 12

Quantitative

Question 13

Conductivity is a ____________ physical property

Answer 13

Quantitative

Question 14

What is a chemical property?

Answer 14

The ability of a substance to change/react and form new substances

Question 15

What are 3 examples of a chemical property?

Answer 15

Reactivity with acid, combustibility, corrosion (stability, toxicity)

Question 16

What are the 5 points of the particle theory?

Answer 16

Particles, Identical, Spacing, Attraction, Movement

Question 17

Matter is divided into 2 groups; _______ and _______

Answer 17

Mixtures (made up of 2 or more different types of particles) and pure substances (made of only 1 type o’ particle)

Question 18

What is the difference between mixtures and compounds?

Answer 18

Compounds are chemically combined while mixtures are physically combines

Question 19

________ is a type of mixture in which you can see 2 or more phases

Answer 19

Heterogenous mixture

Question 20

What is a physical change?

Answer 20

A change in matter that doesn’t produce any new products or substances

Question 21

What is a chemical change?

Answer 21

A change in matter that produces new substances

Question 22

What are the 5 clues that a chemical change happened?

Answer 22

A new colour appears, heat is given off, bubbles of gas are formed, precipitate forms in a liquid, change is difficult to reverse

Question 23

What is the mass number?

Answer 23

Total number of neutrons and protons

Question 24

What are examples of subatomic particles?

Answer 24

Electrons, protons, neutrons

Question 25

Burying garbage is a _______ change

Answer 25

Physical THEN chemical

Question 26

Running a car motor is a _____ change

Answer 26

Chemical

Question 27

Dissolving sugar is a ___________ change

Answer 27

Physical

Question 28

Melting wax is a ________ change

Answer 28

Physical

Question 29

The number of valence electrons increases ___________

Answer 29

As you move across a period (is the same for elements in the same group)

Question 30

The size of an atom increases as you move _________

Answer 30

Down or right to left

Question 31

What are 2 ways that atoms can combine?

Answer 31

1. Gaining or losing electrons | 2. Sharing electrons

Question 32

What are ionic bonds?

Answer 32

Ions held together by their charges, very strong (crystal lattice)

Question 33

What are covalent bonds?

Answer 33

Atoms held together because they are sharing electrons

Question 34

What is viscosity?

Answer 34

The measure of a substance's resistance to flow (viscous = slow)

Question 35

What is melting point?

Answer 35

Temperature where a solid turns into a liquid

Question 36

What is solubility?

Answer 36

A measure of the ability of a substance to dissolve in another

Question 37

What is ductility?

Answer 37

The ability of a substance to be stretched into a wire

Question 38

What is hardness?

Answer 38

A substance's ability to be scratched

Question 39

What is conductivity?

Answer 39

A substance's ability to conduct electricity or heat

Question 40

What is combustibility?

Answer 40

A substance's ability to burn in air

Question 41

What is corrosion?

Answer 41

A substance's ability to react with air to form an oxide

Question 42

What is stability?

Answer 42

A substance's ability to remain unchanged

Question 43

What is toxicity?

Answer 43

A substance's ability to cause harmful effects in plants/animals