atomic structure

Question 1

what does filtration separate

Answer 1

insolouble solids from liquids

Question 2

how do you filter

Answer 2

using filter paper
funnel
beaker

Question 3

where will the solid be left in filtration

Answer 3

On the filter paper

Question 4

what does evaporation seperate

Answer 4

separates solouble salts from soloution

Question 5

what do you need for evaporation

Answer 5

evaporating dish
tripod
bunsen burner

Question 6

what is the disadvantage of evaporation

Answer 6

thermal decomposition can happen
will be left with more unattractive and smaller crystals

Question 7

what’s the advantage of evaporation

Answer 7

Quick and easy

Question 8

what’s crystallisation

Answer 8

also separation of solouble salts from soloution

Question 9

what’s the process of crystallisation

Answer 9

(look on flash card)

Question 10

what did JJ thomposon discover

Answer 10

electrons

Question 11

what was JJ THOMPSONS model like

Answer 11

plum pudding model
ball of positive charge
with negative electrons embedded in it

Question 12

what did rutherford discover

Answer 12

postitive nucleus by firing positively charged alpha particles at a thin sheet of gold

Question 13

what was rutherford nuclear model like

Answer 13

positive nucleus with a cloud of negative charge

Question 14

what did neil’s bohr discover

Answer 14

that the electron was orbiting the positive nucleus in they shell

Question 15

what did james chadwick discover

Answer 15

neutron

Question 16

how does an atom become stable

Answer 16

gain a full outer shell

Question 17

what does the atomic number show(bottom number)

Answer 17

number of protons
(which is the same as number of electrons)

Question 18

What does mass number show

Answer 18

protons and neutrons

Question 19

what is the max shells

Answer 19

2,8,8

Question 20

what does the group show

Answer 20

how many elections are on the outer shell

Question 21

does losing an electron make it become a positive ion or negative ion

Answer 21

positive

Question 22

what did mendeleev order the elements according to

Answer 22

properties

Question 23

did Mendeleev leave gaps

Answer 23

yes for undiscovered elements

Question 24

What lead to many people believing MENDELEEV

Answer 24

discovery of isotopes - same number of proton diffrent number of neutrons

Allowed elements to be ordered by their properties instead of atomic weight

Question 25

what is the vertical line called

Answer 25

group

Question 26

what is horizontal line called

Answer 26

period

Question 27

what is group 0 called

Answer 27

noble gases

Question 28

what’s group 1 called

Answer 28

alkalai metals and become more reactive as you go down the attraction between positive nucleus and negative electron becomes weaker

Question 29

what’s group 7 called

Answer 29

Halogens, less reactive as they go down

Question 30

where do you find non metals

Answer 30

right

Question 31

where do you find metals

Answer 31

left

Question 32

what do metals do in chemical reaction

Answer 32

loses electron to form a positive ion

Question 33

what do non metals do in chemical reaction

Answer 33

gain electrons to become negative ions

Question 34

what is an isotope

Answer 34

same number of protons
diffrent number of neutrons