Exam 1

Question 1

Can be measured without changing the composition of the sample. Ex. Mass, density, color, and melting point

Answer 1

Physical properties

Question 2

describes the reactivity of a material

Answer 2

Chemical properties

Question 3

a material that is chemically the same throughout (homogenous)

Answer 3

Substance

Question 4

cannot be broken into simpler substances

Answer 4

Element

Question 5

can be broken down into elements

Answer 5

Compounds

Question 6

matter that can be separated into simpler materials by physical methods

Answer 6

Mixture

Question 7

the agreement of a set of measurements with the true value

Answer 7

Accuracy

Question 8

How many grams are in 1 Kg

Answer 8

1000 grams

Question 9

a physical property of a substance calculated as the mass per unit volume

Answer 9

Density = Mass/Volume

Question 10

there is no detectable change in mass when a chemical reaction occurs

Answer 10

Law of Conservation of Mass

Question 11

has a positive charge and forms when an atom loses one or more electrons

Answer 11

cation

Question 12

has a negative charge and form when an atom gains one or more electrons

Answer 12

anion

Question 13

Isotopic mass is the mass in ____

Answer 13

u

Question 14

atoms of an element whose nuclei contain different numbers of neutrons

Answer 14

Isotopes

Question 15

a horizontal row on the periodic table

Answer 15

period

Question 16

a vertical column containing chemically similar elements

Answer 16

group

Question 17

Where are the noble gasses located on the periodic table

Answer 17

Far-right group

Question 18

What are the diatomic atoms?

Answer 18

Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Bromine (Have No Fear Of Ice Cold Beer)

Question 19

____ formula gives the number of every type of atom in the molecule

Answer 19

Molecular

Question 20

____ formula of a chemical compound is the simples whole number ration of atoms present in a compound

Answer 20

empirical

Question 21

Find the Formula: Carbonate

Answer 21

CO3^2-

Question 22

Find the Formula: Hydroxide

Answer 22

OH^-

Question 23

Find the Formula: Nitrate

Answer 23

NO3^-

Question 24

Phosphate

Answer 24

PO4^3-

Question 25

Sulfate

Answer 25

SO4^2-

Question 26

The name of the _____ is the same as the element

Answer 26

cation

Question 27

The name of the _____ is formed from the name of the element by changing the ending to ide

Answer 27

anion

Question 28

Find the Formula: Ammonia

Answer 28

NH3

Question 29

Methane

Answer 29

CH4

Question 30

usually hard brittle solids with high melting points

Answer 30

ionic compounds

Question 31

usually have lower melting points, and some are liquids or gases at room temperature

Answer 31

molecular compounds

Question 32

How to find the mass percentage of an element

Answer 32

(mass of element / mass of compound) x100

Question 33

the maximum quantity of a product that can be obtained from a chemical reaction, based on the amounts of starting materials

Answer 33

the theoretical yield

Question 34

mass of product isolated in a reaction

Answer 34

actual yield

Question 35

Percent yield formula = ___

Answer 35

(actual yield / theoretical yield) x 100

Question 36

What is the charge of the group far left on the periodic table

Answer 36

+1

Question 37

What is the charge of the group next to the far left on the periodic table

Answer 37

+2

Question 38

What is the charge of the group in the middle of the periodic table

Answer 38

Depends.

Question 39

What is the charge of the far right column on the periodic table?

Answer 39

0

Question 40

What is the charge of the 3 groups next to the far right on the periodic table

Answer 40

-1, -2, -3

Question 41

What is the charge of the last two groups on the right of the periodic table

Answer 41

4+, 3+

Question 42

Naming Acids such as H3PO4, where the anion ends in ate, is called ------

Answer 42

Phosphoric acid, add the suffix -ic

Question 43

Naming Acids such as NO2 , where the anion ends in ite (Nitrite), is called ------

Answer 43

Nitrous Acid, add the suffix -ous

Question 44

Naming Acids such as S, where the anion ends in ide (Sulfide), is called ------

Answer 44

Hydrosulfuric acid