CHP 2

Question 1

Element? Example

Answer 1

A substance that cannot be broken down

Question 2

4 Most common Elements in living things?

Answer 2

1. Oxygen
2. Carbon
3. Hydrogen
4. Nitrogen

Question 3

Trace Elements? Example

Answer 3

required small amounts and essential for life (14)

Flourine, Iron Ect.

Question 4

Characteristics of atoms of the same element?

Answer 4

Molecule not a compound

Question 5

Where are Protons, Neutrons and Electrons located?

Answer 5

Protons and Neutrons=Nucleus

Electrons= cloud orbiting nucleus

Question 6

Atomic Mass?

Answer 6

Amount of material in an object

= Protons + Neutrons

Question 7

Characteristics of an Atom w/ more Protons than Electrons

Answer 7

A positive Ion

Cation

Question 8

Surface Tension? Example

Answer 8

The cause of Hydrogen bonds.
the measure of how dificult it is to stretch/break surface of liquid
Water has strong resistance to temp change.

Question 9

Evaporation Cooling? Example

Answer 9

When a substance evaporates and surface liquid remaining behind cools down
Sweat

Question 10

Characteristics of Water as it freezes

Answer 10

Water molecules are moved apart, stable hydrogen bonds

Question 11

Solution, Solute, Solvent? Ex

Answer 11

Solution: homogeneous mixture of 2 or more substances
Solute: dissolving substance
Solvent: dissolving agent

Question 12

Acid? Example

Answer 12

Chemical compound that releases H+ (Hydrogen Ion) to a solution
Contains more H+
Lemon Juice

Question 13

Base?

Answer 13

Accepts H+ and removes them from solution

has more OH-

Question 14

Covalent Bonds?

Answer 14

2 Atoms share 1+ pairs of outer-shell electrons

Strongest bond

Question 15

Why is water considered a Polar Molecule?

Answer 15

Electrons are not shared equally

one with an uneven distribution of charge

Question 16

Hydrogen Bonds?

Answer 16

Weakest Bond

bonds are not shared equally

Question 17

Cohesion?

Answer 17

caused by hydrogen bonds

tendency of molecules sticking together

Question 18

Adhesion?

Answer 18

sticking together of two different things

Water and Bottle

Question 19

Buffer?

Answer 19

Substances that resist pH change
accepts H+ ions wen they are in excess
donate H+ ions wen that are depleted

Question 20

Electron Configuration?

Answer 20

Atomic # ,Protons and Electrons are the same
P+N=M#
first ring holds 2 then all others hold up to 8

Question 21

Atomic #?

Answer 21

Same as Prontons and Electrons

Question 22

Bonds b/w matter molecules

Answer 22

Chemical bonds

held together by attractions