Pure substances

Question 1

Matter may be classified according to their

Answer 1

State or Phase

Question 1

observable even without
changing the composition of matter

Answer 1

Physical Properties

Question 2

observed once a
material undergoes a chemical reaction

Answer 2

chemical properties

Question 3

matter have a fixed or definite composition

Answer 3

Pure substances

Question 4

combinations of two or more substances

Answer 4

Mixtures

Question 5

a useful tool that can help in identifying elements that exhibit

Answer 5

Periodic table of elements

Question 6

made up of a specific number of atoms or groups of atoms that
are combined through a chemical reaction

Answer 6

Pure substances

Question 7

the simplest form of matter
● made up of only one kind of atom
● elements of different kinds also differ in
the atoms that make them up

Answer 7

Element

Question 8

Two types of Pure substances

Answer 8

Elements and Compounds

Question 9

___ elements known to exist arranged in the periodic table of
elements. __ are naturally occurring , while __ are synthetic

Answer 9

118, 94, 24

Question 10

The periodic table classifies elements into 3 categories

Answer 10

Metals, non-metals, Metalloids

Question 11

leftmost of the periodic table

Answer 11

Metals

Question 12

rightmost of the periodic table

Answer 12

Nonmetals

Question 13

staircase-like line between metals and
nonmetals

Answer 13

Metalloids

Question 14

the only metal that is
liquid at room temperature

Answer 14

Mercury

Question 15

● general properties:
○ solid at room temperature
○ lustrous
○ malleable
○ ductile
○ heat/electricity conductors

Answer 15

Metals

Question 15

general properties:
○ opposite of metals
○ gaseous or dull solids
○ poor conductors of heat and electricity

Answer 15

Nonmetals

Question 16

the only nonmetal that exists in liquid
form at room temperature.

Answer 16

Bromine

Question 16

exhibit properties of both metals
and nonmetal
● conducts heat and electricity but not
as good as how metals act as
conductors
● semiconductors

Answer 16

Metalloids

Question 17

composed of two or more
different elements that are
combined in a fixed ratio
by a chemical reaction

Answer 17

Compounds

Question 17

Bonus

Answer 17

The properties of elements that make up a compound are
different from the properties of the compound formed.

Question 18

Examples of Metalloid

Answer 18

Silicon and germanium

Question 19

Classifications of Compound

Answer 19

Organic and inorganic compounds

Question 20

consist of two or more pure
substances that are combined
physically

Answer 20

Mixtures

Question 21

Mixtures may be further classified as

Answer 21

Homogeneous And Heterozygous mixtures

Question 22

consists of substances that are evenly distributed all throughout
● the components cannot be distinguished from each other by the
naked eye
● also known as solution

Answer 22

Homogeneous mixture

Question 23

consists of substances that are not evenly distributed all
throughout
● the components can be distinguished from each other by the
naked eye
● can be further classified as colloids or suspensions

Answer 23

Heterogeneous

Question 24

composed of two components:
○ solute - the substance that is dissolved
by another substance; exists in smaller
amounts
○ solvent - the dissolving medium in
which the solute dissolves; most
abundant

Answer 24

Solution

Question 25

the substance that is dissolved
by another substance; exists in smaller
amounts

Answer 25

solute

Question 26

the dissolving medium in
which the solute dissolves; most
abundant

Answer 26

Solvent