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sci exam 1 > cycle test 1 yr 9 > Flashcards

cycle test 1 yr 9 Flashcards

chemistry

1
Q

acid + metal carbonate =

A

salt, water. carbon dioxide (neutralisation)

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2
Q

acid + metal =

A

salt + hydrogen

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3
Q

water +metal

A

metal hydroxide + hydrogen

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4
Q

acid + metal hydroxide

A

salt + water (neutralisation)

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5
Q

acid + metal oxide

A

salt + water (neutralisation)

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6
Q

lime water test tests for:

A

carbon dioxide

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7
Q

what does the squeaky pop test test for

A

hydrogen

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8
Q

chemical equation for sodium + water

A

Na+H2O=NaClH+H₂ (sodium +water=sodium chloride+hydrogen)

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9
Q

chemical equation for magnesium + hydrochloric acid

A

Mg+HCl=MgCl+H₂ (magnesium+hydrochloric acid=magnesium chloride +hydrogen)

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10
Q

hydrochloric acid =

A

Hcl- chloride salts

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11
Q

nitric acid=

A

HNO₃ - nitrate salts

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12
Q

sulphuric acid =

A

H₂SO₄ - sulphate salts

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13
Q

what happens to electrons in ionic bonds

A

The atoms transfer electrons to form a molecule (gain or lose electrons)

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14
Q

what happens to electrons in covalent bonds

A

the electrons are shared to form a covalent molecule

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15
Q

ionic bonding is between:

A

between metal and non-metal ions

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16
Q

covalent bonding is between:

A

between non-metals

17
Q

what happens to electrons in metallic bonding

A

the electrons delocalised

18
Q

what was john dalton’s atomic model

A

Atoms were tiny spheres or
solid balls

19
Q

what was jj thompson’s atomic model

A

plum pudding (ball of positive charge with electrons in the ‘pudding’)

20
Q

what was Ernest Rutherford’s atomic model

A

Positive charge concentrated in the nucleus
Electrons on the outside of the atom

21
Q

what experiment did Ernest Rutherford do and what did it achieve

A

the gold foil experiment, he fired alpha particles at gold atoms it determined the nuclear model -> Revealed that an atom is mostly ‘empty space’ and
there is a positive charge in the nucleus of an atom

22
Q

What was bohr’s nuclear model

A

he determined that electrons were arranged in the shells we know today

23
Q

what was chadwick’s nuclear model

A

he discovered neutrons in the nucleus

24
Q

what are the elements in group 1

A

alkali metals

25
Q

what are group 7s

A

halogens

sci exam 1 (6 decks)

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