The Chemistry Of Life

Question 1

Atom

Answer 1

Basic unit of matter that the study of chemistry begins with

Question 2

Nucleus

Answer 2

Strong forces bind portions and neutrons together form a nucleus

Question 3

Protons

Answer 3

Positively charged particles

Question 4

Neutrons

Answer 4

Carry no charge

Question 5

Electrons

Answer 5

Negatively charged particles

Question 6

Element

Answer 6

Pure substance that consists entirely of 1 type of atom

Question 7

Isotopes

Answer 7

Atoms of the same element that differ in the #of neutrons they contain

Question 8

Radioactive isotopes

Answer 8

Their nuclei are unstable and break down at a constant rate over time

Question 9

Compound

Answer 9

Substance formed by the chemical combination of 2 or more elements in different definite proportions

Question 10

A chemical element is a pure substance that consists entirely of one type of

Answer 10

Atom

Question 11

Atoms of the same element that differ in the number of neutrons they contain

Answer 11

Isotopes

Question 12

Difference between ionic bond and covalent bond

Answer 12

Ionic bond- 1 or more electrons are transferred from 1 atom to another
Covalent bond- electrons shared between atoms

Question 13

Cohesion

Answer 13

Attraction between molecules of the same substances

Question 14

Adhesion

Answer 14

Attraction between molecules of different substances

Question 15

Mixture

Answer 15

Material composed of 2 or more elements or compounds that are physically mixed together

Question 16

Solution

Answer 16

Ions gradually become dispensed in water, forming a solution

Question 17

Solute

Answer 17

Substance that is dissolved

Question 18

The substance in which the solute dissolves

Answer 18

Solvent

Question 19

Acids

Answer 19

Any compounds that forms H+ ions in solution

Question 20

Bases

Answer 20

Compound that produces hydroxide ions in solution

Question 21

Buffers

Action

Answer 21

Weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH

Question 22

Polymer

Answer 22

a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together

Question 23

Polymer example

Answer 23

many synthetic organic materials used as plastics and resins.

Question 24

Carbohydrates

Answer 24

Compounds made up of carbon, hydrogen, and oxygen atoms, usually in ratio of 1:2:3

Question 25

Lipids

Answer 25

Form of carbon and hydrogen atoms

Question 26

Lipids function

Answer 26

Used to store energy

Question 27

Saturated

Answer 27

The fatty acids that contain the maximum possible number of hydrogen atoms

Question 28

Nucleus acids

Answer 28

Macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorus

Question 29

Nucleotides

Answer 29

Nuc

Question 30

Electrons are shared but not

Answer 30

Equally

Question 31

Higher hydrogen atoms=

Answer 31

Stronger acid