Biochemical Unit 4

Question 1

The smallest portion of an element

Answer 1

Atom

Question 2

The center part of an atom that contains protons and neutrons

Answer 2

Nucleus

Question 3

A particle in an atom found in the nucleus that has a positive electrical charge

Answer 3

Proton

Question 4

A particle in an atom found in the nucleus that has no electrical charge

Answer 4

Neutron

Question 5

A particle in an atom that has a negative electrical charge

Answer 5

Electron

Question 6

Substance that cannot be separated into a simpler substance, examples: Carbon, oxygen, gold

Answer 6

Element

Question 7

An orderly of elements based on their atomic numbers

Answer 7

Periodic table

Question 8

An element’s position in the periodic table based on (and equal to) the number of protons it has in its nucleus

Answer 8

Atomic number

Question 9

Anything that has mass and occupies space

Answer 9

Matter

Question 10

Atoms of the same element that had different numbers of neutrons in the nucleus

Answer 10

Isotopes

Question 11

The mass contained in an element nucleus, which is equal to the number of protons plus the number of neutrons.

Answer 11

Atomic Mass

Question 12

The distance the electrons travel around the nucleus of an atom

Answer 12

Electron energy level

Question 13

A chemical combination of two or more atoms or elements

Answer 13

Chemical compound

Question 14

Process that occurs when one substance is changed into another

Answer 14

Chemical reaction

Question 15

An elements ability or tendency to combine with another element

Answer 15

Reactivity

Question 16

Tendency of atoms to gain, lose, or share their electrons

Answer 16

Octet rule

Question 17

The attractive force between atoms that is forced when atoms transfer or share their electrons

Answer 17

Chemical bound

Question 18

A diagram of an atom that represents its valence electrons as dots around the chemical symbol

Answer 18

Electron dot diagram

Question 19

A connection between atoms when electrons are attracted, shared, or transferred

Answer 19

Chemical bound

Question 20

A bond formed when elements transfer electrons (gain or lose)!!!

Answer 20

Ionic bound

Question 21

An electrically charged “atom” that has either gained or lost electrons.

Answer 21

Ion

Question 22

A bound formed when elements share electrons (SHARE)!

Answer 22

Covenant bound

Question 23

Carbon containing compounds that make up living tissue

Answer 23

Organic compound

Question 24

Molecule that has a partial positive on one end and a partial negative on the other end

Answer 24

Polar molecule

Question 25

In case of water molecules, the weak bond that occurs when the hydrogen in one molecule is attracted to the oxygen in another water molecule

Answer 25

Hydrogen bond

Question 26

The attraction between molecules of the same kind

Answer 26

Cohesion

Question 27

The film like quality on the surface of a liquid that is caused by the attraction of liquid molecule to themselves

Answer 27

Surface tension

Question 28

The attraction of one type of molecule to a different type of molecule

Answer 28

Adhesion

Question 29

The tendency of a liquid to draw up into a narrow tube due to the liquids properties of cohesion and adhesion

Answer 29

Capillary action

Question 30

The amount of heat needed to raise the temperature of one gram of a substance one degree Celsius

Answer 30

Specific heat

Question 31

A substance that dissolved another

Answer 31

Solvent

Question 32

An atom or molecule that had gained or lost electrons so that it has a positive or negative charge

Answer 32

Ion

Question 33

Any process that occurs In a living organism, such as muscle movement in animals or photosynthesis in plants

Answer 33

Biological process

Question 34

A measure of acidity or alkalinity of a substance

Answer 34

pH

Question 35

A solution with more hydrogen ions than hydroxide ions; having a pH less that 7

Answer 35

Acid

Question 36

A solution with more hydroxide ions than hydrogen ions; with a pH more than 7

Answer 36

Base

Question 37

A substance that prevents the pH of a solution from changing even if a small amount of an acid or base is added

Answer 37

Buffer