Mod 3&4

Question 1

A pure substance that cannot be broken down by ordinary chemical means

Answer 1

Element

Question 2

Specific version of an element with:
Different mass numbers and neutrons
Same protons
Carbon-12 (6 pro + 6 neu)
Carbon-14 (6 pro + 8 neu)

Answer 2

Isotopes

Question 3

PET Scan

Answer 3

Position Emission Tomography

Question 4

Radioisotopes in medicine

Answer 4

Neuron splits into a proton and electron

Question 5

What determines whether atoms will interact?

Answer 5

The number and arrangement of their electrons

Question 6

Atoms’ number of electrons on lower and subsequent shells

Answer 6

2 on lower, 8 on rest

Question 7

Two or more atoms joined by strong bonds

Answer 7

Molecules

Question 8

Two or more atoms of different elements joined by strong or weak bonds
H2= molecule
H2O= molecule and compound

Answer 8

compounds

Question 9

Atoms share a pair or pairs of electrons to fill outermost shell.

Answer 9

Covalent Bonds

Question 10

Types of covalent bonds

Answer 10

polar- unequal sharing, more time near nucleus than most protons. More attracted to O than H.

nonpolar- Atoms share e- equally. Same number of protons

Question 11

Hydrogen bonds

Answer 11

Bonds between adjacent molecules (not atoms). Between H2O molecules cause surface tension

Question 12

State of matter that has constant volume and shape

Answer 12

Solid

Question 13

State of matter that has constant volume but changes shape

Answer 13

Liquid

Question 14

State of matter that changes volume and shape

Answer 14

gas

Question 15

Reactant?

Answer 15

Materials going into a reaction

Question 16

Product?

Answer 16

Materials coming out of a reaction

Question 17

Metabolism?

Answer 17

Many reaction occurring at one time

Question 18

Work?

Answer 18

Change in mass or distance

Question 19

Energy?

Answer 19

The power to do work

Question 20

Kinetic energy?

Answer 20

Energy of motion

Question 21

Potential energy?

Answer 21

Stored energy

Question 22

Chemical energy?

Answer 22

Potential energy store in chemical bonds

Question 23

Water accounts for how much of our body weight?

Answer 23

2/3

Question 24

Solution?

Answer 24

Mix of 2 or more substances

Solution=solute+solvent

Question 25

Concentration?

Answer 25

The amount of solute in a solvent

Question 26

Solubility?

Answer 26

Water’s ability to dissolve a solute a solvent to make a solution

Question 27

Hydrophilic?

Answer 27

Interacts with water (i.e.: ions a polar molecules)

Question 28

Hydrophobic?

Answer 28

Do not interact with water (i.e.: non polar molecules, fats, oils)

Question 29

Colloid?

Answer 29

A series of very large organic molecules.

Question 30

Suspension

Answer 30

A solution in which particles settle (sediment) whole blood.