Chem 3 Vocabulary

Question 1

Matter

Answer 1

Anything that takes up space

Question 2

Substance

Answer 2

Matter that has a uniform and unchanging composition
Ex table salt, hydrogen, oxygen, sucrose, glucose, Mercury

Question 3

Physical property

Answer 3

A substance that can be observed or measured Without changing the composition of the substance
Ex luster, hardness, density, melting point, malleability, ductility,

Question 4

Luster

Answer 4

How shiny or bright something is

Question 5

Malleability

Answer 5

Ability to be pounded into a thin sheet

Question 6

Ductility

Answer 6

Ability to be drawn in a thin wire

Question 7

Conductitivity

Answer 7

Ability to conduct heat or electricity

Question 8

Extensive property

Answer 8

A physical property that is dependent on the amount of substance present
Ex mass, length, width, weight, height, VOLUME

Question 9

Intensive property

Answer 9

A physical property that IS NOT dependent, (independent) on the amount of substance present
Ex color, density, boiling point, melting point, solubility, expansion, porosity

Question 10

Density

Answer 10

Mass per unit volume

Question 11

Solubility

Answer 11

The ability of a substance to dissolve in another substance

Question 12

Porosity

Answer 12

The state of having many pores or holes

Question 13

Pyrite

Answer 13

Fools gold that people tried to sell instead of gold

Question 14

Thermal

Answer 14

Energy or heat

Question 15

Chemical property

Answer 15

Describes the ability of a substance to combine with or change into one or more substances

Question 16

Stability

Answer 16

How stable a substance is

Question 17

Radioactivity

Answer 17

How radioactive something is

Question 18

Reactivity

Answer 18

How reactive something is

Question 19

Flammability

Answer 19

How combustible something is

Question 20

Ammonia

Answer 20

NH3

Question 21

States of matter

Answer 21

Solid liquid gas

Question 22

Plasma

Answer 22

A fourth state of matter on earth that occurs naturally is lighting bolt and fire

Question 23

Solid

Answer 23

Form of matter that has a definite shape

Question 24

Liquid

Answer 24

Form of matter that flows, takes shape of container

Question 25

Fluid

Answer 25

Substance that flows, has no definite shape Ex liquid and gas

Question 26

Gas

Answer 26

Flows to conform to the shape of its container, fills volume of container

Question 27

Gaseous

Answer 27

relating to or having the characteristics of a gas.

Question 28

Vapor

Answer 28

Is the gaseous state of the substance that is a solid or liquid at room temp, Ex steam

Question 29

Physical changes

Answer 29

Changes that alter a substance without changing its composition

Question 30

Phase change or changes of state

Answer 30

Matter changes from one phase to another, are common example of physical changes Like gas to liquid

Question 31

Chemical change or chemical reaction

Answer 31

Substance change into a new substance

Question 32

Reactants

Answer 32

The substance present at the start

Question 33

Products

Answer 33

New substances that are formed in reaction

Question 34

Chemical equations

Answer 34

Shows the relationship between reactants and products

Question 35

Law of conservation of mass

Answer 35

During a chemical reaction, Mass is neither lost nor gained

Question 36

Yields

Answer 36

Produces

Question 37

Mixture

Answer 37

Combo of 2 or more elements combined physically

Question 38

Element

Answer 38

Substances that cannot be separated into simpler substances by physical or chemical means 118 elements 92 natural

Question 39

Synthesize

Answer 39

Made by man

Question 40

Symbols

Answer 40

Used in place of the Name of element

Question 41

Periods

Answer 41

Horizontal row on periodic table

Question 42

Groups or tamilies

Answer 42

Vertical columns

Question 43

Compounds

Answer 43

Combo of 2 or more different elements that are combined chemically Like H and O to H2O

Question 44

Electrolysis

Answer 44

Process that uses electrical energy to bring about chemical reactions

Question 45

Chemical formula

Answer 45

A combo of symbols of the elements that make up that compounds Ex H2O

Question 46

Law of definite proportions

Answer 46

A compound is always composed of the same elements in the same proportion by mass

Question 47

Percentage mass

Answer 47

The ratio of mass of each element to the total mass of the compound as a percentage Percent of mass % = mass of element/ mass of compound x 100

Question 48

Law of multiple proportions

Answer 48

When different compounds are formed by a combination of the same elements, different masses of one element combine with the same relative mass of other elements in a ratio of a small whole number