chapt 3 : exploring diversity of matter by its chemical composition

Question 1

definition of element

Answer 1

consist of 1 type of atom, cannot be broken down into simpler substances by chemical methods

Question 2

definition of compound

Answer 2

a substance made up of two or more element chemically combined together

Question 3

how is a compound formed

Answer 3

chemical reaction occurred

Question 4

does a compound has the same properties as its constituent elements

Answer 4

no

Question 5

does the compound have a fixed composition by mass

Answer 5

yes

Question 6

can compounds be separated using physical methods

Answer 6

no, it can be separated using chemical methods

Question 7

definition of mixture

Answer 7

consist of two or more substances (element/compound) which are not chemically combined

Question 8

does chemical reaction occur when mixture is formed

Answer 8

no

Question 9

are the constituent of elements in mixtures in fixed composition by mass

Answer 9

no

Question 10

does mixtures has the same properties has its constituent elements

Answer 10

yes

Question 11

is air a mixture

Answer 11

yes

Question 12

what are impure substances

Answer 12

mixture

Question 13

what are pure substances

Answer 13

elements, compounds

Question 14

how are elements classified

Answer 14

metals, non-metals

Question 15

how are mixtures classified as

Answer 15

solutions and suspensions

Question 16

factors affecting solubility

Answer 16

temperature, type of solute, type of solvent

Question 17

factors affecting rate of dissolving

Answer 17

stirring, temperature, surface area of solute

Question 18

what does dilute mean

Answer 18

the solvent has very little solute

Question 19

what does concentrated mean

Answer 19

the solution has a large amount of solute

Question 20

what does saturated mean

Answer 20

solution has maximum amount of solute, no more solute can dissolve

Question 21

what does homogenous means

Answer 21

the solute completely dissolved in the solvent
whereas not homogenous means the solute did not dissolve in the solvent