Ch 2-1 the chemistry of life

Question 1

Chemistry

Answer 1

The study of the properties of matter and how matter changes

Question 2

Matter

Answer 2

Anything that has mass and takes up space

Question 3

Element

Answer 3

A pure substance made of only one kind of atom

Question 4

Atom

Answer 4

Basic unit of matter
Smallest particle of an element

Question 5

Nucleus

Answer 5

Center of an atom

Question 6

Neutron

Answer 6

A subatomic particle that has no charge also found in the nucleus of an atom

Question 7

Proton

Answer 7

a subatomic particle with a positive charge and is found in the nucleus of an atom

Question 8

eletron

Answer 8

subatomic particle that has a negative charge

Question 9

Periodic table

Answer 9

a chart of the elements showing the repeating patter of their properties

Question 10

ion

Answer 10

a charged atom

Question 11

ionic bonding

Answer 11

chemical boding that results from the electrical attraction between a positive and negative sarge

Question 12

Covalent Bond

Answer 12

A chemical bond that involves sharing a pair of electrons between atoms in a molecule

Question 13

Molecule

Answer 13

Smallest unit of a compound

Question 14

Chemical Change

Answer 14

A change in matter that produces one or more new substances

Question 15

Physical Change

Answer 15

A change in a substance that does not involve a change in the identity of the substance

Question 16

Energy

Answer 16

the ability to do work

Question 17

Kinetic Energy

Answer 17

energy of motion

Question 18

Potential Energy

Answer 18

stored energy

Question 19

Absolute Zero

Answer 19

The temperature at which no more energy can be removed from matter

Question 20

Exothermic

Answer 20

Chemical Reaction in which energy is primarily given off in the form of heat

Question 21

Endothermic

Answer 21

Absorbs heat

Question 22

Catalyst

Answer 22

substance that speeds up the rate of a chemical reaction

Question 23

Solution

Answer 23

A homogeneous mixture of two or more substances

Question 24

Solute

Answer 24

A substance that is dissolved in a solution.

Question 25

Solvent

Answer 25

A liquid substance capable of dissolving other substances

Question 26

Diffusion

Answer 26

Movement of molecules from an area of higher concentration to an area of lower concentration.

Question 27

Equilibrium

Answer 27

A state of balance

Question 28

Concentration Gradient

Answer 28

A difference in the concentration of a substance across a distance.

Question 29

Permeable

Answer 29

Able to be passed or soaked through

Question 30

Osmosis

Answer 30

Diffusion of water through a selectively permeable membrane

Question 31

Polar

Answer 31

Molecule with partial charges. Mixes with water.

Question 32

Adhesion

Answer 32

An attraction between molecules of different substances

Question 33

Cohesion

Answer 33

Attraction between molecules of the same substance

Question 34

Specific Heat

Answer 34

The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius

Question 35

Acid

Answer 35

A substance that increases the hydrogen ion concentration of a solution.

Question 36

Base

Answer 36

A substance that decreases the hydrogen ion concentration in a solution.

Question 37

Neutral

Answer 37

Neither an acid or a base