M1: States and classification of matter

Question 1

three states of matter

Answer 1

Solid liquid and gas

Question 2

Solid

Answer 2

Their particle are close together hence they can not be compressed and cannot move freely from place to place

Question 3

Liquid

Answer 3

particles are close together but are not hold rigidly in position and can move past one another.

Question 4

Gas

Answer 4

particles are far apart from each other and are arranged in a random way. particles also move quickly in all direction

Question 5

Has a solid fixed shape

Answer 5

Solid

Question 6

Flow and takes the shape of the containers

Answer 6

liquid

Question 7

can fill up any containers of any shape and size and can be compressed because molecules are distanced

Answer 7

gas

Question 8

microscopic characteristics of solids

Answer 8

Particles are close from each other

Question 9

Microscopic characteristics of liquid

Answer 9

particles are far from each other

Question 10

microscopic characteristics of gas

Answer 10

particles are very far from each other

Question 11

Macroscopic characteristics of a solid

Answer 11

Has definite shape and has definite volume

Question 12

Macroscopic characteristics of a liquid

Answer 12

has indefinite shape and has definite volume

Question 13

Macroscopic characteristics of a gas

Answer 13

has no fixed shape and volume

Question 14

2 classification of a matter

Answer 14

Pure substance and mixtures

Question 15

2 classifications of pure substance

Answer 15

elements and compounds

Question 16

2 classifications of mixture

Answer 16

homogenous and heterogenous

Question 17

2 classifications of elements

Answer 17

natural and artificial

Question 18

homogenous is what kind of mixture

Answer 18

solution

Question 19

heterogenous is what kind of mixture

Answer 19

suspension

Question 20

what is a pure substance

Answer 20

is a matter that has a definite composition and distinct properties. It can either be an element or a compound.

Question 21

what is an element

Answer 21

the simplest form of matter since it is composed of one kind of atom. It is pure substance that cannot be decomposed into a simpler substance by ordinary chemical means.

Question 22

which elements are natural?

Answer 22

1-92 atomic numbers are natural, but 43 and 61 are not since they are highly radioactive (nawawala after sometimes for they have half-life)

Question 23

how long is francium’s half life?

Answer 23

22 minutes

Question 24

how long is uranium’s half life?

Answer 24

billion year

Question 25

what is half-life

Answer 25

The amount of time before a radioactive element disintegrate into half

Question 26

What is a compound?

Answer 26

A compound is a chemical substance that forms when two or more different elements combine in a fixed ratio

Question 27

What is one of the most important characteristics of a compound?

Answer 27

it has a chemical formula

Question 28

how can you separate compounds?

Answer 28

through chemical means

Question 29

Example of a compound that has chemically different characteristics than the element composing it?

Answer 29

Sodium chloride (NaCl), which is formed when sodium (Na) atom reacts with chlorine (Cl) atom. Chlorine is a green, poisonous gas that is very toxic. It was used as a weapon during World War I. On the other hand, sodium is a soft silvery metal that reacts vigorously with water and, if held in the hand, could burn it severely. Together however, these atoms produce the compound sodium chloride (table salt), a clear, crystalline solid particle that is essential for human life

Question 30

What is a Mixture?

Answer 30

are made up of two or more substances combined physically in variable proportions

Question 31

homogenous mixture

Answer 31

also called a solution, is relatively uniform in composition. It is composed of a solute or the dissolved substance, and a solvent or the dissolving medium.

Question 32

how can you separate mixture?

Answer 32

through physical means. ex: gold and copper in bronze can be separated through heating or melting because the two metals involved have different melting points:

Question 33

a substance that will be dissolved?

Answer 33

solute

Question 34

a substance that will be used for dissolving

Answer 34

solvent

Question 35

Heterogeneous mixture

Answer 35

A mixture whose composition consists of 2 or more physically distinct phases.

Question 36

example of heterogenous mixture

Answer 36

ice cubes in a drink, sand and water, and salt and oil

Question 37

What is Tyndall effect?

Answer 37

a test in a substance whether a substance is a colloid or a solutions, if you put light in the substance, you can see the particle; colloid.

Question 38

elements that ends with um or im?

Answer 38

those are metal except for 10 elements (mercury, gold, copper, iron, copper, potassium, etc.)

Question 39

elements that ends with ne or en except for some elements

Answer 39

non metals

Question 40

characteristics of metalloids

Answer 40

semi conductor: commonly used in computers