module 2 atoms and reactions

Question 1

What is the formula for carbon dioxide

Answer 1

CO2

Question 2

what is the formula for carbon monoxide

Answer 2

CO

Question 3

what is the formula for nitrogen monoxide

Answer 3

NO

Question 4

what is the formula for sulfur trioxide

Answer 4

SO3

Question 5

what is the formula for ammonia

Answer 5

NH3

Question 6

what is the formula for methane

Answer 6

CH4

Question 7

what is the formula for hydrogen sulfide

Answer 7

H2S

Question 8

what is the formula for hydrogen

Answer 8

H2

Question 9

What is the formula for nitrogen

Answer 9

N2

Question 10

what is the formula for oxygen

Answer 10

O2

Question 11

what is the formula for fluorine

Answer 11

F2

Question 12

what is the formula for phosphorus

Answer 12

P4

Question 13

what is the formula for sulfur

Answer 13

S8

Question 14

what is the formula for hydrochloric acid

Answer 14

HCl

Question 15

what is the formula for sulfuric acid

Answer 15

H2SO4

Question 16

what is the formula for nitric acid

Answer 16

HNO3

Question 17

what is the formula for phosphoric acid

Answer 17

H3PO4

Question 18

What is the charge on a group 1 ion

Answer 18

+

Question 19

What is the charge on a group 2 ion

Answer 19

2+

Question 20

What is the charge on a group 3 ion

Answer 20

3+

Question 21

what is the ion of ammonium

Answer 21

NH4^+

Question 22

what is the charge of a group 7 ion

Answer 22

-

Question 23

what is the charge of group 6 ions

Answer 23

2-

Question 24

what is the formula for a nitrate ion

Answer 24

NO3^ -

Question 25

what is the formula of a sulfate ion

Answer 25

SO4^ 2-

Question 26

what is the formula of a carbonate ion

Answer 26

CO3^ 2-

Question 27

what is the formula of a hydrogencarbonate ion

Answer 27

HCO3 ^ -

Question 28

what is the formula of a hydroxide ion

Answer 28

OH-

Question 29

what is the formula for a hydride ion

Answer 29

H-

Question 30

what is the formula for a phosphate ion

Answer 30

PO4^ 3-

Question 31

acid + metal ->

Answer 31

salt + hydrogen

Question 32

acid + metal oxide ->

Answer 32

salt + water

Question 33

acid + carbonate ->

Answer 33

salt + water + carbon dioxide

Question 34

acid + hydroxide ->

Answer 34

salt + water

Question 35

hydrocarbon + oxygen ->

Answer 35

carbon dioxide + water

Question 36

acid + ammonia ->

Answer 36

ammonium salt

Question 37

What is the electron configuration for krypton (the furthest you can be asked to go - can work out others from this one)

Answer 37

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6

Question 38

what is an orbital

Answer 38

a bit of space that an electron moves in

Question 39

if there are 2 electrons in an orbital, which direction will they spin

Answer 39

opposite directions

Question 40

what shape are S orbitals

Answer 40

spherical

Question 41

what shape are p orbitals

Answer 41

dumbbell shaped

Question 42

what is a precipitate

Answer 42

the insoluble product when 2 solutions are mixed

Question 43

can we have a nitrate precipitate and if so which ones

Answer 43

no as all nitrates are soluble

Question 44

can we have a halide precipitate and if so which ones

Answer 44

most halides are soluble so wouldn't form a precipitate however silver halides and lead halides would form a precipitate

Question 45

can we form sulfate precipitates and if so which ones

Answer 45

most sulfates are soluble so wouldn't but lead sulfate, barium sulfate and calcium sulfate would

Question 46

can we form a carbonate precipitate and if so which ones

Answer 46

most carbonates produce a precipitate and the only ones that don't are lithium carbonate, sodium carbonate, potassium carbonate and ammonium carbonate

Question 47

can a hydroxide form a precipitate

Answer 47

most hydroxides will form a precipitate however lithium hydroxide, sodium hydroxide, potassium hydroxide, ammonium hydroxide and group 2 hydroxides

Question 48

Describe the relative energies of the 2s orbital and each of the three 2p orbitals in a nitrogen atom

Answer 48

- p orbitals have greater energy than s orbitals - the 3 p orbitals have equal energy

Question 49

How many electrons can be in each of the first 4 shells

Answer 49

1st = 2 2nd = 8 3rd = 18 4th = 32

Question 50

What did Dalton believe the atom was in 1803

Answer 50

Solid sphere with no subatomic particles

Question 51

What did Thompson believe the atom was in 1897

Answer 51

Plum pudding model - mass of positive with negative wedged in

Question 52

What did Rutherford believe the atom was in 1909

Answer 52

Mass mainly positive in centre (nucleus) but there is empty space

Question 53

How did Bohr develop the atom in 1913

Answer 53

Added that electrons orbited in shells / energy levels

Question 54

What does the current atom (nuclear model) look like

Answer 54

Protons and neutrons making up the nucleus with mainly empty space and electrons orbiting in shells

Question 55

Define relative atomic mass

Answer 55

Weighted mean mass of an atom of an element compared to 1/12th the mass of an atom of carbon 12 which is taken as exactly 12. It is a weighted mean due to the presence of isotopes.

Question 56

Define relative isotopic mass

Answer 56

Mass of an atom of an isotope of an element compared to 1/12th the mass of an atom of carbon 12 which is taken as exactly 12

Question 57

How do you calculate relative atomic mass

Answer 57

(Atomic number x percentage as a decimal) + (Atomic number x percentage as a decimal)