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Chemistry > Periodicity > Flashcards

Periodicity Flashcards

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1
Q

Define periodicity

A

A repeating trend in properties across each period

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2
Q

Define 1st ionisation energy

A

The energy required to remove 1e mole from 1 mole of gaseous atoms to form 1 mole of 1+ ions

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3
Q

What factors affect ionisation energy?

A
  1. Nuclear charge
  2. Electron shielding
  3. Distance
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4
Q

How do group 2 oxides react with water?

A

They produce a metal hydroxide

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5
Q

How do group 2 oxides react with dilute acid?

A

They react to form a salt and water

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6
Q

How do group 2 hydroxides react with dilute acids?

A

They form a salt and water

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7
Q

How does solubility in group 2 hydroxides change?

A

It increases down the group

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8
Q

How does the solubility of group 2 sulphates change?

A

It decreases down the group

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9
Q

What uses of group 2 compounds are there?

A

Ca(oh)2 slaked lime used in agriculture
Ca(oh)2 aqueous is limewater
Mg(oh)2 milk of magnesium

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10
Q

How do halogens react?

A

They are oxidising agents

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11
Q

What is the halogen displacement rule?

A

A more reactive halogen will displace a less reactive halogen in a solution of its ions

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12
Q

What is chlorine’s colour in water?

A

Pale green

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13
Q

What is bromines colour in water?

A

Orange

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14
Q

What is iodine’s colour in water?

A

Brown

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15
Q

What is chlorine’s colour in hexane?

A

Pale green

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16
Q

What is bro Ines colour in hexane?

A

Red

17
Q

What is iodine’s colour in hexane?

A

Violet

18
Q

Define disproportionation

A

The oxidation and reduction of the same element in a displacement reaction

19
Q

What is the difference between reactions a halogen with a hot or cold alkali?

A

The halogens oxidation no. in the acid produced

20
Q

What is the test for chlorine?

A

Bleaches damp litmus

21
Q

What is the test for iodine?

A

Add iodine indicator

22
Q

What is the test for bromine?

A

Add to potassium iodide and it should turn red-brown

23
Q

Why do some hydrogen halides have high bps?

A

Hydrogen bonding is really strong

24
Q

Are hydrogen halides soluble?

A

Yes and they react to form ions

25
Q

What colour is silver chloride?

A

White

26
Q

What colour is silver bromide?

A

Cream

27
Q

What colour is silver iodide?

A

Yellow

Chemistry (18 decks)

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