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Year 9 science > Chemistry > Flashcards

Chemistry Flashcards

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1
Q

metal + oxygen

A

= metal oxide

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2
Q

nitrogen + oxygen

A

= nitrous oxide

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3
Q

diatomic elements

A

Have no fear of ice cold beer

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4
Q

have

A

hydrogen H2

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5
Q

No

A

Nitrogen N2

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6
Q

Fear

A

Fluorine F2

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7
Q

Of

A

Oxygen O2

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8
Q

Ice

A

Iodine I2

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9
Q

Cold

A

Chlorine Cl2

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10
Q

Beer

A

Bromine Br2

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11
Q

sodium + oxygen = sodium oxide

A

Na + O = NaO

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12
Q

hydrogen + bromine = hydrogen bromide

A

H + Br = HBr

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13
Q

Sodium + chlorine = sodium chloride

A

Na + Cl = NaCl

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14
Q

sodium + oxygen = sodium oxide ​

A

Na + O2 = NaO​

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15
Q

hydrogen + bromine= hydrogen bromide

A

H2 + Br2 = HBr​

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16
Q

sodium + chlorine = sodium chloride​

A

Na + Cl2 = NaCl​

17
Q

What is the rule of conservation of mass?​

A

During reaction, number of atoms of each element remains the same. No atoms are gained or lost during a reaction; the atoms are simply rearranged.

18
Q

how to write 2 molecules of o2

A

2o2

19
Q

metal + acid

A

makes salt + hydrogen

20
Q

Displacement reaction

A

when a more reactive element , replaces a less reactive one in a compound

21
Q

Indication of a reaction is

A

A color change

22
Q

Complete combustion

A

When oxygen reacts with a fuel to produce carbon dioxide and water

23
Q

Incomplete Combustion

A

Occurs when the supply of air / oxygen is poor. water as still produced, but carbon monoxide and carbon are produced instead of carbon dioxide.

24
Q

What would be the equation for combustion

A

fuel + oxygen - water + carbon dioxide

25
Q

What would the reactant of combustion

A

fuel + oxygen

26
Q

What would be the products complete combustion

A

Water + carbon dioxide

27
Q

Fuel

A

coal, oil, natural gas

28
Q

equation for combustion

A

Methane + oxygen = carbon dioxide

29
Q

sulfur dioxide

A

SO2 COLOURFUL GAS/LIQUID with strong odour

30
Q

many fossil fuels contain…

A

sulfur impurities

31
Q
A

Year 9 science (2 decks)

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