CT2

Question 1

Dalton’s model of the atom

Answer 1

all matter is made of atoms
atoms are small
can’t be broken down(false)
all atoms of are element are the same but different from another elements

Question 2

modern model of an atom

Answer 2

protons and neutrons form the nucleus and electrons orbit around it at very high speeds

Question 3

Who discovered sub atomic particles

Answer 3

Catholde

Question 4

Electrons

Answer 4

particles smaller than atoms found in atoms they have a negative charge

Question 5

Electric charges

Answer 5

Proton +1
Neutron 0
Electron -1

Question 6

relative masses

Answer 6

Proton: 1
Neutron: 1
electron: =0

Question 7

location of the subatomic particles

Answer 7

Proton: Nucleus
Neutron: Nucleus
electron: Orbiting nucleus

Question 8

if an atom has a neutral charge (0) it has

Answer 8

the same number of prtons and electrons

Question 9

the way electrons orbit

Answer 9

at a set distance
at a set energy level called an electron shell

Question 10

compare nucleus to atom

Answer 10

atom is 1000 times bigger than nucleus

Question 11

Define isotopes

Answer 11

atoms of same element with different number of neutrons

Question 12

relative mass

Answer 12

protons + neutrons

Question 13

atomic cumber

Answer 13

protons

Question 14

how is the relative atomic mass calculated

Answer 14

add up the regular element and the isotopes in proportion and divide by the number of elements you added up (it is a mean of all the variations of the element)

Question 15

ar

Answer 15

RAM or relative atomic mass

Question 16

atomic mass formula

Answer 16

(abundance isotope 1 x mass of isotope1) + (abundance isotope 2 x mass of isotope 2):
number of isotopes

Question 17

Mendeleev

Answer 17

ordered atoms by atomic mass(left to right) and groups by properties(top to bottom) he left blank spaces for undiscovered elements

Question 18

Moseley

Answer 18

X-ray análisis to show that properties are linked to atomic numbers.

Question 19

How are the elements in the periodic table arranged

Answer 19

By atomic number
columns called groups that indicate the number of electrons in the last shell

rows called periods that indicate the number of shells

Question 20

how electrons are arranged

Answer 20

they fill up the shells from inner to outer

the 1st shell can hold up to 2 electrons

the rest of the shells can hold up to 8

Question 21

how to name compounds

Answer 21

1 metal firs
2 non metal comes second except for oxygen
3termination:
if it doesn’t have oxygen ide
if its oxygen +1 element ide
if it is oxygen + 2 or more things ate

Question 22

how particles are arranged in a gas

Answer 22

random
not touching
speed out in all space available

Question 23

movement of particles in a gas

Answer 23

freely
all directions
bounce

Question 24

evaporating

Answer 24

particles stay randomly arranged
they get further apart
they can move freely

Question 25

condensing

Answer 25

the particles stay randomly arranged
they get closer together
now they only move around each other

Question 26

how particles are arranged in a liquid

Answer 26

randomly
touching each other
take the shape of the container

Question 27

movement in particles in a liquid

Answer 27

flow
move in any direction through liquid
theymove arroud each other

Question 28

melting

Answer 28

particles have more energy from heat
start to move
break the atractive forces

Question 29

Freezing

Answer 29

particles lose energy
movement stops
attractive forces appear

Question 30

arrangement of particles in a solid

Answer 30

regular patron
tightly packed, no space
keeps its shape

Question 31

movement of particles in a solid

Answer 31

vibrations in fixed positions

Question 32

melting point

Answer 32

temperature at witch certain substance passes from solid to liquid

Question 33

boiling point

Answer 33

temperature at witch certiain substance passes from liquid to gas

Question 34

parts of the apparatus used for filtration

Answer 34

funnel
filter papper
conical flask

Question 35

parts of apparatus used for simple distillation

Answer 35

fireproof mat
Bunsen burner
tripod
gauze
evaporating basin

Question 36

filtration

Answer 36

the separation of a liquid and an isloluble solid using filter paper

it separates the solid RESIDUE
and a liquid FILTRATE

Question 37

simple distillation

Answer 37

to separate a soluble solid from a liquid by evaporating the former

Question 38

apparatus used in fractional distillation that aren used in simple distillation

Answer 38

anti bumping granules
condenser
thermometer

Question 39

fractional distillation

Answer 39

used to separate liquid substances by using their different boiling points

the liquid that evaporates and then condenses is the distillate

Question 40

solution

Answer 40

solute(solid)
solvent(liquid)

Question 41

paper chromatography

Answer 41

separates coloured solutes from solutions like ink and food colouring

Question 42

process of paper chromatography

Answer 42

1 draw a line on a filter paper in pencil with a ruler
2add substance(s) just above line
3sumerge the paper until the line
4 water will have risen and so will the substances separating into their different components
5 measure the hight the components have reached and calculate the rf value

Question 43

how to calculate Rf values

Answer 43

maximum heigh reached by the substance divided by the height reached by the water

Question 44

phases of paper shomatography

Answer 44

mobile phase: solvent and solute
stationary phase: paper and bowl