Midterm Ch 1-7

Question 1

Density =

Answer 1

Mass/volume (divide by)

Question 2

Mass of protons and neutrons

Mass of electron

Charge of each and location

Answer 2

Roughly the same mass
Electrons are extremely small

Protons are positive, in
Neutrons are neutral, in
Electrons are negative, out

Question 3

Isotopes

Answer 3

Vary in number of neutrons

Question 4

Endothermic
Exothermic

Answer 4

Reaction that absorbs energy, reactants low products high

Reaction that gives off energy, reactants high products low

Question 5

Ionic vs covalent compounds
Electron relationship

Answer 5

Ionic transfer electrons

Covalent compounds share electrons

Question 6

Ionic compound

Answer 6

Metal + nonmetal

Question 7

Covalent compound

Answer 7

2 nonmetals or nonmetal and metalloid

Question 8

Cations are named as

Anions named

Answer 8

Simple element

Ending in “ide”

Question 9

In water the solid form is ___ dense than ___ form

Answer 9

Less
Liquid

Question 10

Periodic table
Periods are
Groups/families are

Answer 10

Rows

Columns

Question 11

All molecules that make up living matter are built from

Answer 11

Non metals

Question 12

Atomic radii

Answer 12

To left and down

Question 13

Ionization energy

Answer 13

Up from bottom left corner of table and to the right = increases

Question 14

Ionization energy

Answer 14

Minimum energy needed to remove electrons

Question 15

Ion

Answer 15

Atom or group that has a positive or negative charge from losing or gaining electrons

Question 16

Cation vs anion

Answer 16

Cation is positive ion

Anion is negative ion

Question 17

Maximum number of electrons in Lewis dot structure

Answer 17

8

Valence electrons represented in this structure

Question 18

Valence electrons

Answer 18

Electrons that participate in chemical reactions

Question 19

Redox reaction

Question 20

Nonpolar compounds tend to be a

Polar molecules have ____ elements

Answer 20

Single element (O2)

Multiple, CO2

Question 21

Group number represents alkali metals, alkali earth metals, halogens and Nobel gases

Answer 21

Alkali= group 1

Alkali earth= group 2

Halogens (diatomic) = group 7

Nobel gases = group 8

Question 22

Noble gases melting and boiling points are

Answer 22

Very close to each other

Question 23

Gases are easily _____ because there is a lot of space between the ____

Answer 23

Compressed

Atoms

Question 24

Charles gas law

Answer 24

V1/t1=v2/t2

Volume of gas is directly proportional to temperature

Question 25

Boyles law

Answer 25

P1v1=p2v2

Pressure of gas increases as volume decreases

Question 26

Intermolecular forces

Question 27

6 kinetic molecular theory postulates

Question 28

What are the catalysts in biological reactions

What do they do

Answer 28

Enzymes

REDUCE the activation energy of a reaction

Question 29

Activation energy

Answer 29

Minimum energy necessary for a reaction to occur

Question 30

K&raquo_space; 1

K &laquo_space;1

K~ 1

Answer 30

Favors products (right)

Favors reactants (left)

Equilibrium neither favored

Question 31

K equilibrium constant equation

Answer 31

Products on top
Reactants on bottom