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N5 Chemistry > Need To Know > Flashcards

Need To Know Flashcards

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1
Q

What charge is the nucleus of an atom

A

Positive

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2
Q

Whats a covalent bond

A

Name for attraction that two nuclei have for a shared pair of electrons

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3
Q

Whats a molecule

A

Small group of atoms covalently bonded together

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4
Q

What holds the electrons tog in a covalent bond

A

Attraction that two nuclei have for a shared pair of electrons

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5
Q

What group in the periodic table are monatomic what does this mean

A

Group 0- atoms arent bonded to anything

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6
Q

Whats an ionic bond

A

Attraction between positive and negative ions

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7
Q

What is a compound

A

Two or more different types of atom chemically bonded together

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8
Q

Which type of oxides dissolve in water to form an acidic solution

A

Non metal oxides

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9
Q

Which type of oxides dissolve in water to form an alkali solution

A

Metal oxides

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10
Q

Name 3 metal bases

A

Metal oxides
Metal hydroxide
Metal carbonate

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11
Q

Acid and bases word equation

A

Metal oxide + acid —> salt and water
Metal hydroxide + acid—> salt + water
Metal carbonate + acid —> salt + water + carbon dioxide

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12
Q

Why is indicator used in a titration

A

So that the end point is visible

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13
Q

What is the trend in boiling and melting points within a homologous series as molecular size increases explain this trend.

A

Increasing size increases, MP and BP. This is because larger molecules have stronger intermolecular forces which need more energy to overcome

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14
Q

Describe the test to distinguish between unsaturated and saturated compounds

A

Unsaturated compounds decolourise bromine water immediately

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15
Q

Whats an addition reaction

A

When the C=C breaks open and a molecule adds into the newly created spaces

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16
Q

Whats meant by hydrogenation

A

Addition reaction with hydrogen

17
Q

Whats meant by halogenation

A

Addition reaction with a halogen

18
Q

What is metallic bonding

A

Attraction between positive metal ions and a sea of delocalised electrons

19
Q

Why can metals conduct electricity

A

They have free moving electrons

20
Q

Whys a D.C current used in electrolysis

A

So that the products can be easily identified

21
Q

Metals word equations

A

Metal + oxygen—> Metal oxide
Metal +water —> metal hydroxide + hydrogen
Metal + dilute acid —> salt + hydrogen

N5 Chemistry (3 decks)

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