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year 9 revision > Chemistry test 2 > Flashcards

Chemistry test 2 Flashcards

1
Q

Solid -> Liquid

A

Melting

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2
Q

Liquid -> Gas

A

Boiling

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3
Q

Gas -> Liquid

A

Condensing

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4
Q

Liquid -> Solid

A

Freezing

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5
Q

Solids have a … shape

A

Fixed

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6
Q

Solids cannot be C… and forced into a smaller shape. We say the volume is F…

A

Compressed
Fixed

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7
Q

Liquids cannot be C… and forced into a smaller space. We say that the volume is F…

A

Compressed
Fixed

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8
Q

Liquids can flow and take the S… of their containers

A

Shape

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9
Q

Gases can easily be C… (squeezed), gases do not have a fixed S… or V…

A

Compressed
Shape
Volume

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10
Q

Gases flow easily, spreading into O… spaces

A

Open

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11
Q

What are the limitations of the particle model?

A

1) The model doesn’t show the forces of attraction acting between particles

2) Particles are not solid spheres- they are single atoms, ions or molecules that consist mostly of empty space, molecules have a range of shapes.

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12
Q

Atoms have no overall C…

A

Charge

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13
Q

Atoms have the same number of P… and E…

A

Protons
Electrons

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14
Q

Why are noble gases the most stable?

A

They have a full outer shell

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14
Q

What are ions?

A

Charged atoms (have a different number of protons and electrons

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15
Q

Metals loose e- to form P… I…

A

Positive ions

16
Q

Non metals gain e- to form N… I…

A

Negative ions

17
Q

ATOMIC STRUCTURE:
An atom must contain equal numbers of P… charged protons and negatively charged E… . The number of N… in an atom is less of an importance.

A

An atom must contain equal numbers of positively charged protons and negatively charged electrons. The number of neutrons in an atom is less of an importance.

18
Q

ATOMIC STRUCTURE:
Protons and N… are tightly bound together in the N… of an atom. The E… move rapidly around the nucleus in energy levels (or S…)

A

Protons and neutrons are tightly bound together in the nucleus of an atom. The electrons move rapidly around the nucleus in energy levels (or shells)

19
Q

ATOMIC STRUCTURE:
When an atom gains or loses electrons, an I… is formed. Positive ions are formed when metal atoms L… electrons and negative ions are formed when N…-M… atoms G… electrons. When an ion is formed, there is no change in the nucleus because the numbers of P… and neutrons stay the same

A

When an atom gains or loses electrons, an ion is formed. Positive ions are formed when metal atoms lose electrons and negative ions are formed when non-metal atoms gain electrons. When an ion is formed, there is no change in the nucleus because the numbers of protons and neutrons stay the same

20
Q

Charge of Proton

21
Q

Charge of Neutron

22
Q

Charge of Electron

year 9 revision (11 decks)

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