C4 - The Periodic Table Flashcards

1
Q

What is the plum pudding model?

A

There is a positively charged ‘pudding’ with negative electrons inside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How was the plum pudding model proved wrong?

A

They used a thin piece of gold and fired particles through it and most went through but some deflected backwards showing a positive nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is Bohr’s model?

A

There is a nucleus with fixed orbit shells with electrons on these

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the nucleus?

A
  • Contains protons and neutrons

- It has a positive charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the electrons?

A
  • Negatively charges
  • Move around on the shells
  • They have virtually no mass
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the mass and charge of protons, neutrons and electrons?

A

Mass Charge
Proton. 1. 1
Neutron. 1. 0
Electron. 0.0005. -1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the mass number?

A

Total number of protons and neutrons (big number)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the atomic number?

A

Number of protons (small number)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are isotopes?

A

They are the same except from have extra neutrons

Same atomic number but different mass number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What did Döbereiner make the periodic table look like?

A

He ordered them in relative atomic mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What did Newland make the periodic table look like?

A

He put it in similar properties such as metals non metals…

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What did Dmitri Mendeleev’s periodic table look like?

A

He put them in order of atomic mass and similar properties but left gaps for predicted elements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What do the periods in the periodic table represent?

A

The number of shells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do the groups of the periodic table represent?

A

This shows the number of electrons on the outer shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is ionic bonding?

A

This is where a metal and a non metal transfers electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is covalent bonding?

A

When two non metals share electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What happens as you go down group 1 metals?

A

They get more reactive as the outer electron is more easily lost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are group 1 metals?

A

Alkali metals

19
Q

What is oxidation and reduction?

A

O xidation
I s
L oss

R eduction
I s
G ain

20
Q

What happens when group 1 metals react with water?

A

Hydrogen gas is produces meaning it fizzes, moves very fast, bubbles and sometimes ignites

21
Q

What flame is produced with lithium, sodium and potassium?

A
Lithium = red flame
Sodium = yellow/orange flame
Potassium = lilac flame
22
Q

What are group 7 metals?

23
Q

What happens as you go down the group 7 metals?

A

As you go down they get less reactive because it’s harder to gain an electron

24
Q

What happens when halogens are reacted?

A

They form salts

25
What happens with more and less reactive halogens?
The more reactive ones will displace the less reactive ones
26
What are some of the useful properties of metals?
They have a crystal structure: - High mp and bp - Strong - Good conductors
27
What are super conductors?
Metals at very low temperatures so they loose there resistance
28
What are super conductors used for?
- Power cables - Electromagnets - Electronic circuits
29
What are transition metals?
Similar to normal metals but make good catalysts
30
Give examples of transition metals which are catalysts.
Iron (harber process) Nickel (margarine)
31
What is thermal decomposition?
This is the breaking down with heat
32
What is an example of thermal decomposition using copper(II) carbonate?
Copper(II) carbonate > copper oxide + carbon dioxide CuCO(3) > CuO + CO(2)
33
What is a precipitation reaction?
This is when two solutions react and form an insoluble solid in the solution
34
What is the precipitation reaction between copper(II) sulfate + sodium hydroxide?
Copper(II) sulfate + sodium hydroxide > copper(II) hydroxide + Sodium sulfate
35
What colours are made with transition metals?
Copper(II) hydroxide = blue Iron(II) hydroxide = grey/green Iron(III) hydroxide = orange/brown
36
How do we get our water?
- Surface water | - Groundwater
37
What are the four steps in water purification?
- Mesh - Sand filtration (removes the large materials in it) - Sedimentation (makes fine particles clump together when iron sulphate is added) - Chlorination (kills microbes)
38
What impurities are in tap water?
- Nitrate residue - Lead compounds - Pesticide residue
39
What can you test water for?
Dissolved ions
40
How do you test for sulfate ions?
Use barium chloride
41
How do you test for sulfate ions using barium chloride?
1) Add hydrochloric acid to the test sample 2) Add ten drops of barium chloride solution 3) If there is a white precipitate then its present
42
How do you test for halide ions?
Use silver nitrates
43
How do you test for halide ions using silver nitrate?
1) Add some dilute nitric acid to the test sample 2) Add 10 drops of silver nitrate solution 3) If halide ions are present a precipitate will be formed
44
What do different coloured precipitates show when testing for halide ions?
- Chloride ions = white precipitate - Bromide ions = cream precipitate - Iodide ions = pale yellow precipitate