(s)(l)(g)(aq) + random stuff

Question 1

(s)

Answer 1

the compound is a solid

Question 2

(l)

Answer 2

the compound is a liquid

Question 3

(g)

Answer 3

the compound is a gas

Question 4

(aq)

Answer 4

stands for aqueous, and is when a solute is dissolved in the solvent.
ex: hydrochloric acid is an aqueous solution because it’s dissolved in water

Question 5

element definition

Answer 5

a substance made of only one type of atom

Question 6

compound definition

Answer 6

a substance made of 2 or more elements chemically bonded

Question 7

mixture definition

Answer 7

a substance made of 2 or more elements not chemically bonded

Question 8

what is the atomic number

Answer 8

the atomic number tells us how many protons and electrons are in an atom/element

Question 9

what is the atomic mass

Answer 9

the atomic mass tells us how many neutrons and protons are in an atom/element

Question 10

what are isotopes

Answer 10

atoms of the same element with different mass numbers. they have the same number of protons, but a different number of neutrons

Question 11

what do particle diagrams for elements look like

Answer 11

they are the same colour and the same size

Question 12

what do particle diagrams for compounds look like

Answer 12

they show more than 1 type of atom chemically bonded together, and we can tell that it’s made out of more than 1 type of atom because they will be different colours and sizes. we can tell they’re chemically bonded together because they would be joined together.

Question 13

what do particle diagrams for mixtures look like

Answer 13

2 or more atoms with different colours/ sizes not joined together

Question 14

what is effervesence

Answer 14

Effervescence is the formation of gas bubbles in a liquid by a chemical reaction

Question 15

what is the conservation of mass

Answer 15

The Law of Conservation of Mass states that no matter is lost or gained during a chemical reaction.

Question 16

radius of an atom

Answer 16

1x10^-10m (1 nanometer)

Question 17

radius of a nucleus

Answer 17

1x10^-14m

Question 18

electron configuration

Answer 18

the first shell holds up to 2 electrons, the second and third hold up to 8 electrons, and the rest are for any extra electrons. there is no limit for the amount of shells an atom can have.

Question 19

why are some of the mass numbers decimals

Answer 19

because it’s the weighted average mass of all of the isotopes of that element.

Question 20

what is chromatography

Answer 20

chromatography is used to separate mixtures which have different solubilities, such as pigments in ink

Question 21

what is filtration

Answer 21

filtration is used to separate an insoluble substance from a liquid.

Question 22

filtration method

Answer 22

-add a funnel into a conical flask
-fold filter paper then put it into the funnel
-pour the mixture into the filter paper funnel
-watch the residue turn into filtrate

Question 23

what is crystallisation

Answer 23

the process of forming solid crystals from a solution

Question 24

what is distillation

Answer 24

Separates 2 liquids with different boiling points

Question 25

what is fractional distillation

Answer 25

Fractional distillation is a process by which components in a chemical mixture are separated into different parts (called fractions) according to their different boiling points.