unit exam study

Question 1

compound

Answer 1

a substance made up of two or more different chemical elements combined in a fixed ratio

Question 2

pure substance

Answer 2

substances that are made up of only one kind of particle and have a fixed or constant structure

Question 3

solution

Answer 3

a homogenous mixture of 2 chemicals

Question 4

suspension

Answer 4

a heterogeneous mixture of chemicals

Question 5

colloid

Answer 5

mixtures in which dispersed particles of one substance are suspended in another substance

Question 6

the Tyndall effect

Answer 6

the phenomenon in which the particles in a colloid scatter the beams of light that are directed at them

Question 7

the physical properties of matter

Answer 7

color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point

Question 8

physical changes

Answer 8

In a physical change, the appearance or form of the matter changes but the kind of matter in the substance does not

Question 9

meniscus

Answer 9

a curve in the surface of a molecular substance (water, of course) when it touches another material

Question 10

H

Answer 10

Hydrogen

Question 11

He

Answer 11

Helium

Question 12

C

Answer 12

Carbon

Question 13

N

Answer 13

Nitrogen

Question 14

O

Answer 14

Oxygen

Question 15

F

Answer 15

Fluorine

Question 16

Ne

Answer 16

Neon

Question 17

Na

Answer 17

Sodium

Question 18

Mg

Answer 18

magnesium

Question 19

Al

Answer 19

Aluminum

Question 20

P

Answer 20

Phosphorous

Question 21

S

Answer 21

Sulfur

Question 22

Cl

Answer 22

Chlorine

Question 23

K

Answer 23

Potassium

Question 24

Ca

Answer 24

calcium

Question 25

Cr

Answer 25

chromium

Question 26

Fe

Answer 26

Iron

Question 27

Si

Answer 27

Silicon

Question 28

Co

Answer 28

Cobalt

Question 29

Ni

Answer 29

Nickel

Question 30

Zn

Answer 30

Zinc

Question 31

Cu

Answer 31

Copper

Question 32

Ag

Answer 32

Silver

Question 33

Sn

Answer 33

Tin

Question 34

I

Answer 34

Iodine

Question 35

Ba

Answer 35

Barium

Question 36

Au

Answer 36

Gold

Question 37

Hg

Answer 37

Mercury

Question 38

Pb

Answer 38

Lead

Question 39

U

Answer 39

Uranium

Question 40

Mn

Answer 40

Manganese

Question 41

Li

Answer 41

Lithium

Question 42

B

Answer 42

Boron

Question 43

Br

Answer 43

Bromine

Question 44

Ar

Answer 44

Argon

Question 45

Be

Answer 45

beryllium

Question 46

What does the Tyndall effect test for

Answer 46

to test whether something is a solution or colloid

Question 47

chemical properties of matter

Answer 47

flammability, toxicity, acidity, reactivity (many types), and heat of combustion

Question 48

the density of freshwater

Answer 48

1 g/cm^3

Question 49

what does Atomos mean

Answer 49

indivisible

Question 50

what was Democritus’s philosophical theory?

Answer 50

the idea that if you sat and cut at a block of wood you would eventually get the smallest possible material or atoms

Question 51

what is a corpuscle?

Answer 51

a minute or elementary particle of matter, such as an electron, proton, or atom

Question 52

what is the quantum wave model?

Answer 52

because of their size and mass, they behave more like a wave than like particles

Question 53

what is an isotope?

Answer 53

when a material has the correct amount of protons, but the wrong amount of neutrons

Question 54

what is the strong nuclear force?

Answer 54

the force binds protons and neutrons together to form a nucleus

Question 55

what is a family on the periodic table?

Answer 55

all the atoms within a specific verticle column

Question 56

what is a group on the periodic table?

Answer 56

all the atoms in a specific horizontal column

Question 57

what is inert

Answer 57

when an element isn’t chemically reactive