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C1, C2,C3 > C2 > Flashcards

C2 Flashcards

1
Q

Whats atmoic number?

A

How many protons in an atom

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2
Q

Whats atomic mass number?

A

Number of protons and neutrons

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3
Q

Whats an isotope?

A

Different forms of same element that have same number of protons but different number of neutrons

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4
Q

Two properties of ionic compounds?

A
  • high melting and boiling points

- they conduct electricity when molten or aqueous

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5
Q

How to make dry insoluble salts

A

Pick two soluble salts mix them with distilled water and filter them through paper into a conical flask and rinse the liquid away for a hard salt

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6
Q

Whats number of protons equal to?

A

Electrons

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7
Q

What is an electrons charge?

A

1/2000

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8
Q

When an anion joins a cation what does it form?

A

Ionic bonds

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9
Q

What happens in ionic bonding?

A

Atoms transfer electrons to form a charged ion (group of atoms)

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10
Q

What colour flame does sodium give?

A

Orange/yellow

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11
Q

Flame of calcium?

A

Brick red

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12
Q

Copper flame?

A

Blue green flame

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13
Q

Whats spectroscopy used for?

A

To identify elements

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14
Q

What are covalent bonds?

A

Bonds that share electrons between two atoms

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15
Q

Four properties of diamond?

A
  • four covalent bond forms each carbon atom
  • very rigid covalent structure
  • really hard
  • doesnt conduct electricity cause theres no free electrons
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16
Q

three detailed properties of graphite?

A
  • each carbon atom forms 3 covalent bonds which slide easily making it a good lubricant
  • layers are held together loosely so can be rubbed onto paper
  • lots of spare delocalised atoms so its a good conducter of electricity
17
Q

What does immiscible mean?

A

When liquids dont mix but float on one another

18
Q

Whats miscible liquids?

A

When they mix together completely

19
Q

How do you seperate immiscible liquids?

A

Shake them together, the denser liquid sinks and other forms at top, then use a seperating funnel with a tap and allow the denser liquid out into a beaker and close tap

20
Q

what seperates miscible liquids?

A

Fractional distillation

21
Q

Whats Rf value formula?

A

Distance travelled by substance divided by distance travelled by substance

22
Q

Two properties of metals?

A
  • conduct heat and electricit well

- malleable, so can make different shapes

23
Q

Two properties of transition metals?

A
  • hugh melting points

- colourful components

24
Q

What happens when you put lithium in water?

A
  • the lump of lithium moves around surface slowly fizzing

- water beckma alkaline so goes purple

25
Q

What happens with sodium and water?

A

Sodium fizzes and moves quickly, may ignite

26
Q

What happens with pottasium and water?

A

Moves cigaroysly burns with lilac flame and explodes sometimes

27
Q

What does the reaction of an alkali metal and water produce?

A

Hydrogen

28
Q

What is an endothermic process?

A

Bond breaking

29
Q

Whats an exothermic process?

A

When a bond forms

30
Q

What is an exothermic reaction?

A

A reaction that gives out energy shown by temperature rise

31
Q

Whats an endothermic reaction?

A

A reaction that takes in energy and is shown by fall in temperature

32
Q

What four things affect the rate of reaction?

A
  • temperature
  • concentration
  • surface area
  • catalyst
33
Q

What does a catalyst do?

A

Speed up the rate of reaction

34
Q

What does higher temperatures do?

A

Increase colisions as particles move faster

35
Q

What does increased concentration do?

A

Increases the amount of particles so collisions are more likely

36
Q

What are faster collisions caused by

A

Increase in temperature

37
Q

Whats the yield of a reaction?

A

The amount of prduct a reaction should produce

C1, C2,C3 (3 decks)

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