Ch 1 & 2 vocab

Question 1

Chemistry

Answer 1

The study of the composition of matter and the changes that matter undergoes

Question 2

Microscopic

Answer 2

small particles that make up all matter, which cannot be observed directly without the use of special instruments

Question 3

substances

Answer 3

matter that has a uniform and definite composition

Question 4

macroscopic

Answer 4

substances that refers to objects that can be seen, touched, and measured directly

Question 5

elements

Answer 5

the simplest form of matter that has a unique set of properties

Question 6

Physical chemistry

Answer 6

a branch of chemistry that is the study of both macroscopic and the atomic properties and phenomena in chemical systems

Question 7

hypothesis

Answer 7

tentative explanation to a scientific question that can be tested

Question 7

Inorganic Chemistry

Answer 7

a branch of chemistry that is the study of chemicals that do not, in general, contain carbon

Question 8

theory

Answer 8

broad explanation that is widely accepted because it is supported by a great deal of evidence

Question 9

law

Answer 9

an explanation that always applies under the sam circumstances

Question 10

energy

Answer 10

ability to do work

Question 11

volume

Answer 11

measure of the space occupied by a sample of matter

Question 12

substance

Answer 12

matter that has uniform and definite composition

Question 13

matter

Answer 13

anything with mass and volume

Question 14

mass

Answer 14

a measure of the amount of matter in a substance or object

Question 15

weight

Answer 15

a measure of the force acting on an object

Question 16

substance

Answer 16

matter that has a uniform and definite composition

Question 17

chemical reaction

Answer 17

process that occurs when one or more substances, called reactants, is changed into one or more new substances called products

Question 18

elements

Answer 18

the simplest form of matter that has a unique set of properties

Question 19

liquid

Answer 19

state of matter with a fixed volume but not a fixed shape

Question 20

gas

Answer 20

form of matter neither definite shape nor definite volume

Question 21

surface tension

Answer 21

a measure of the elastic force in the surface if a liquid

Question 22

heat

Answer 22

energy transferred from one object/substance to the next because of difference in temperature

Question 23

metal

Answer 23

an element that is a good conductor of heat and electricity

Question 24

vaporization

Answer 24

process in which a liquid is converted from a gas to a liquid

Question 25

homogeneous mixture

Answer 25

a mixture where the composition is uniform throughout the mixter ex. salt water

Question 26

heterogeneous mixture

Answer 26

a mixture where composition is not uniform

Question 27

colloids

Answer 27

homogeneous mixture whose particle size is intermediate between those of solution and a suspension

Question 28

solution

Answer 28

homogeneous mixture with tiny particles you cannot see and cannot be settled or filtered out of the mixture

Question 29

suspension

Answer 29

heterogeneous mixture with tiny particles where some settle out of the mixture upon stirring.

Question 30

substance

Answer 30

matter that has uniform and defeinte compostition

Question 31

mixture

Answer 31

a physical blend of two or more components, each of which retains its own identity and properties

Question 32

phase

Answer 32

any part of a sample that has a uniform composition and properties

Question 33

substance

Answer 33

matter that has a uniform and definite composition

Question 34

chromatography

Answer 34

the separation of a mixture by passing it in a solution or suspension or as a vapor through a medium in which the components move at different rates

Question 35

vapor

Answer 35

the gaseous state of a substance that is solid or liquid at room temp

Question 36

distilliation

Answer 36

method of separating a mixture based on differences in boiling points

Question 37

evaporation

Answer 37

the conversion of a liquid to its vapor below the boiling temp of the liquid

Question 38

filtration

Answer 38

a technique that separates the solid from the liquid in a heterogeneous mixture

Question 39

periodic table

Answer 39

arrangement of elements in order of their atomic numbers

Question 40

element

Answer 40

simplest form of matter that has a unique set of properties

Question 41

compound

Answer 41

a substance that contains` two or more elements chemically combined in a fixed proportion

Question 42

chemical change

Answer 42

a change that produces matter with a different composition

Question 43

chemical symbol

Answer 43

a one or two letter designgnation of an element, found on the periodic table

Question 44

chemical properties

Answer 44

the ability of a substance to undergo. specific chemical change

Question 45

corrosion

Answer 45

the deterioration of metals by oxidization

Question 46

precipitate

Answer 46

solid products that forms from a reaction and settles out of a liquid mixture

Question 47

reactant

Answer 47

substance that is present at the start if a chemical reaction