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Flashcards in Lesson 2 Deck (43):
1

an easily observed property of matter (i.e. solid, liquid, or
gas)

State

2

According to the theory, all matter consists of extremely tiny particles
(atoms, molecules, or ions) that are in constant motion.

STATES OF MATTER AND KINETIC-MOLECULAR THEORY

3

properties can be observed by unaided human senses

Macroscopic

4

imagination of how particles look like and how they fit
together to form molecules

Particulate

5

symbols are used to represent observations

Symbolic

6

three (3) levels of matter

Macroscopic
Particulate
Symbolic

7

•has a set of unique properties by which it can be
recognized.
• It cannot be separated into two or more different species by
physical technique at ordinary temperatures.

Pure substances

8

consists of two or more pure substances that can be
separated by physical techniques.

mixture

9

two (2) types of mixtures

Heterogeneous
Homogeneous

10

uneven texture of the material can often be detected
by the naked eye.

Heterogeneous

11

consists of two or more substances in the same
phase. Also often called as solutions.

Homogeneous

12

When a component is separated from its mixture, it said to be

purified.

13

Another type of mixture that has a homogeneous appearance is a

colloid.

14

scattering of light by a colloidal dispersion

Tyndall effect

15

characteristic movement in which the particles
change speed and direction erratically

Brownian movement

16

colloidal particles have uniform electrical
charges

Electrical properties

17

refers to the tendency of the colloidal system
to remain a true solution and the tendency of the colloid to be
coagulated by heating or by addition of an electrolyte.

Stability and unstability

18

colloidal particles are very good in attracting and
holding particles of other substances because of their large surface
area.

Adsorptive property

19

Substances that are composed of only one type of atom are classified as

elements.

20

Substances that are composed of two or more different elements held together by chemical bonds are
referred to as

chemical compound

21

Composition of any compound is represented by its

chemical formula

22

Properties which can be observed and measured without changing the composition of a
substance.

Color
State of Matter
Melting Point
Boiling
Density
Solubility
Electric Conductivity
Malleability
Ductility
Viscosity

23

depend on the amount of a substance present

Extensive properties

24

do not depend on the amount of substance but depends only on the type
of matter.

Intensive properties

25

•Changes in physical properties of a substance.
• The identity of a substance is preserved even though it may have changed its physical state
or the gross size and shape of its pieces.
• Does not results in a new chemical substance being produced.
• The particles (atoms, molecules, or ions) present before and after the change are the same.

Physical Changes

26

One or more substances (the reactants) are transformed into one or more different substances (the
products).

Chemical Changes

27

Defined as the capacity to do work.

Energy

28

is energy associated with motion, such as:
• Motion of atoms, molecules, or ions at the particulate level (thermal
energy)
• Motion of macroscopic objects (mechanical energy)
• Movement of electrons in a conductor (electrical energy)
• Compression and expansion of the spaces between molecules in
the transmission of sound (acoustic energy)

Kinetic Energy

29

results from an object’s position or state and
includes:
• Energy possessed by a held above the floor and by water at the
top of a water wheel (gravitational energy)
• Energy stored in a extended spring
• Energy stored in fuels (chemical energy)
• Energy associated with the separation of electrical charges
(electrostatic energy)

Potential Energy

30

states that energy can neither be
created nor destroyed or the total energy of the universe is constant.

Law of Conservation of Energy

31

• The process of separating a liquid from a solid by allowing the solid to settle at the bottom of
the container and then pouring off the clear liquid carefully, leaving the solid in the container.

Decantation

32

Decantation solid part

residue

33

Decantation liquid part

supernatant liquid

34

The process of separating a solid from a liquid by allowing the liquid to pass through a porous
medium suchas a filter paper.

Filtration

35

The solid that is retained on the filter paper is called the

residue

36

and the liquid that passes
through the filter paper is called the

filtrate

37

The process of separating a solid from a liquid by boiling off the liquid, leaving the solid in the
evaporating dish.

Evaporation

38

the evaporated liquid is called the

evaporate

39

Evaporation solid part is called the

residue

40

The process that occurs when a substance accumulates on the surface of a solid, forming a
film of atoms or molecules

Adsorption

41

The solid to which the material is adsorbed is known as the

adsorbent

42

and the material that is
adsorbed is called the

adsorbate.

43

Sublimation

The transition from solid phase to the gas phase with no intermediate liquid phase.