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Nat 5 Chemistry > Metals - Unit 3 > Flashcards

Metals - Unit 3 Flashcards

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1
Q

What is the definition of metallic bonding?

A

An array of positively charged ions surrounded by a sea of delocalised electrons.

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2
Q

How can metals conduct?

A

The electrons are free to move from one ion to another.

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3
Q

What is the reaction of metals and oxygen?

A

metal + oxygen = metal oxide

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4
Q

what is the reaction for metal and water?

A

metal + water + metal hydroxide = hydrogen

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5
Q

What is the reaction for metal + acid

A

metal + acid = salt + Hydrogen

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6
Q

what 4 metals have no reaction?

A

Gold, sliver, platinum and mercury

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7
Q

All metals above what will react with acid?

A

Hydrogen

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8
Q

All metals above what will react with water?

A

Magnesium

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9
Q

What is oxidation and what do the equations look like?

A

Oxidation is loss of electrons
A + B = AB

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10
Q

What is reduction and what do the equations look like?

A

Reduction is gain of electrons
AB = A + B

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11
Q

What must you do to form a redox equation?

A

Multiply both equations until the electrons have the same value, cancel out.

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12
Q

What unreactive metals can be found in the earth crust as a whole metallic element

A

Silver and Gold

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13
Q

What is an ore?

A

A naturally occurring metal compound

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14
Q

What are the three extraction methods going from easiest to hardest?

A

Heat alone, Heat with Carbon, Electrolysis

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15
Q

What would be the general equation for a metal extracted with heating with carbon?

A

Metal Oxide + Carbon monoxide = metal + carbon dioxide

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16
Q

What happens in electrolysis?

A

The positive ions are attracted to the negative electrode where they gain electrons producing metal atoms

17
Q

What is an electrolyte?

A

A solution which contains ions and can conduct electricity.

18
Q

What does a cell do?

A

Converts chemical energy to electrical energy.

19
Q

How can the electron flow be determined?

A

By order of the electrochemical series.

20
Q

What non-metal can also be used in electrolysis

A

graphite

Nat 5 Chemistry (9 decks)

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