random flashcards i can't remember topic

Question 1

potable water

Answer 1

water that is safe to drink

Question 2

how does the temp of the surroundings change in exothermic reactions

Answer 2

increase

Question 3

how does the temp of the surroundings change in endothermic reactions

Answer 3

decrease

Question 4

waste water

Answer 4

water that has been used eg. rainwater, flushing toilet, usually ends up in rivers

Question 5

exothermic processes

Answer 5

oxidation
combustion
neutralisation

Question 6

endothermic processes

Answer 6

thermal decomposition
sodium hydrogen carbonate+citric acid

Question 7

how is waste water treated?

Answer 7

screening - removes large particles and grit.

this creates sludge with is treated with anaerobic digestion + turned into fertiliser.

and effluent which is treated with aerobic digestion + goes into rivers.

Question 8

where are protons found in atoms

Answer 8

nucleus

Question 9

what charge do protons have

Answer 9

positive

Question 10

what is peer review

Answer 10

when research is checked by other scientists to check for errors or mistakes

Question 11

how are ions formed

Answer 11

when atoms lose or gain electrons

Question 12

why do atoms form ions

Answer 12

to gain a full outer shell of electrons

Question 13

what group are noble gases found in

Answer 13

group 8 / 0

Question 14

relative mass of protons

Answer 14

1

Question 15

relative charge of protons

Answer 15

+1

Question 16

relative mass of neutron

Answer 16

1

Question 17

relative charge of neutron

Answer 17

0

Question 18

relative mass of electron

Answer 18

0

Question 19

relative charge of electron

Answer 19

-1

Question 20

how do you find the protons, electrons and neutrons on the periodic table

Answer 20

16 <— 16 - 8 = 8 neutrons
O
8 <— 8 protons, 8 electrons

Question 21

what ions do acids release in water

Answer 21

hydrogen

Question 22

formula of nitric acid

Answer 22

HNO3

Question 23

which element relights a glowing splint in a experiment

Answer 23

oxygen

Question 24

which element burns with a squeaky pop in an experiment

Answer 24

hydrogen

Question 25

which element turns lime water murky in an experiment

Answer 25

carbon dioxide

Question 26

which element bleaches damp litmus paper, turning it white

Answer 26

chlorine

Question 27

what charge are atoms
positive
neutral
negative

Answer 27

neutral

Question 28

ionic bonds=

Answer 28

metal + non metal

Question 29

covalent bonds=

Answer 29

non metal + non metal

Question 30

metallic bonds=

Answer 30

metal + metal

Question 31

does a giant covalent lattice have covalent bonds or weak intermolecular bonds

Answer 31

covalent bonds

Question 32

does a giant ionic lattice have covalent bonds or weak intermolecular bonds

Answer 32

covalent bonds

Question 33

does a giant metallic lattice have covalent bonds or weak intermolecular bonds

Answer 33

covalent bonds

Question 34

does a simple covalent structure have covalent bonds or weak intermolecular bonds

Answer 34

weak intermolecular bonds

Question 35

examples of giant covalent lattice
D______
________
________

Answer 35

diamond
graphite
graphine

Question 36

examples of simple covalent structure
w____
______ _______

Answer 36

water
carbon dioxide

Question 37

what is CH4

Answer 37

methane

Question 38

what is C2H6

Answer 38

ethane

Question 39

what is C3H8

Answer 39

propane

Question 40

what is C4H10

Answer 40

butane

Question 41

formula for methane

Answer 41

CH4

Question 42

formula for ethane

Answer 42

C2H6

Question 43

formula for propane

Answer 43

C3H8

Question 44

formula for butane

Answer 44

C4H10

Question 45

methane structure diagram

Answer 45

’ H
l
H ~~ C ~~ H
l
H

Question 46

ethane structure diagram

Answer 46

’ H H
l l
H ~~ C ~~ C ~~ H
l l
H H

Question 47

propane structure diagram

Answer 47

’ H H H
l l l
H ~~ C ~~ C ~~ C ~~ H
l l l
H H H

Question 48

butane structure diagram

Answer 48

’ H H H H
l l l l
H ~~ C ~~ C ~~ C ~~ C ~~ H
l l l l
H H H H