Particle

Question 1

What is a particle?

Answer 1

Particle is tiny things that materials are made from.

Question 2

What is a substance?

Answer 2

A substance is made of one type of material only.

Question 3

What does the particle properties depends on?

Answer 3

Particles properties depends on
-how they are arranged, -how they move,
-how strongly they hold together and
-what the particles are like.

Question 4

How the particles are in a solid?

Answer 4

In a solid the particles are:
-close together,
-no space between them,
-the particle vibrate (they have the least amount of kinetic energy),
-they have fix shape and volume

Question 5

How the particles are in a liquid?

Answer 5

In a liquid the particles are:
-close together with small spaces between them,
-slide over each other (liquid particles have more kinetic energy than solid but less than gas),
-the don’t have a fix shape but they have a fix volume.

Question 6

How the particles are in a gas?

Answer 6

In a gas the particles are:
-far apart,
-alot of space between particles,
-particles collide with each other (they have the most amount of kinetic energy)
they don’t have a fix shape or volume.

Question 7

definition of melting.

Answer 7

the change of state from a solid to a liquid

Question 8

what is a melting point?

Answer 8

it’s a point where solid starts becoming liquid

Question 9

how many melting point a pure substance has?

Answer 9

pure substance have a fixed melting point

Question 10

how many melting point an impure substance has?

Answer 10

an impure substance or a mixture of different particles have different melting point.

Question 11

definition of freezing.

Answer 11

the change of state from a liquid to a solid

Question 12

definition of boiling.

Answer 12

the change of state from liquid to gas that occurs when particle leave throughout the liquid and it happen at boiling point.

Question 13

what is a boiling point?

Answer 13

it’s a point where liquid starts becoming gas

Question 14

how boiling can happen?

Answer 14

the boiling can happen if enough energy is transferred to the particles.

Question 15

definition of evaporation

Answer 15

the change of state from liquid to gas that occurs when particle leave only from the surface of the liquid and it happen at any temperature.

Question 16

definition of sublimation

Answer 16

the change of state from solid to gas

Question 17

definition of deposition or de-sublimation

Answer 17

the change of state from gas to solid

Question 18

Diffusion definition

Answer 18

The movement of liquid or gas particles from a place of high concentration to a place of low concentration

Question 19

What is rate of diffusion

Answer 19

The speed at which particles move from an area of higher concentration to an area of lower concentration

Question 20

factors that affect rate of diffusion are?

Answer 20

-Concentration (Higher C the higher rate of diffusion),
-Mass of particles (the heavier the particle the slower it moves or rate of diffusion),
-Temperature (higher T and kinetic energy the higher is the rate of diffusion),
-Properties of solvent (Thickness)

Question 21

Gas pressure definition

Answer 21

the force exerted by gas particles colliding with the wall of their container

Question 22

Factor that affect gas pressure are?

Answer 22

-Temperature (gas P increase when T increase and vice-verse),
-Volume (gas P decrease when V increase and vice-verse)
-Concentration of particles (gas P increase when C increase and vice-verse)