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Chemestry Year 9 > Chem > Flashcards

Chem Flashcards

1
Q

What are the three states of matter

A

Solid, liquid and gas

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2
Q

What is freezing

A

When a substance changes from a liquid state to a solid-state

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3
Q

What is boiling

A

The process by which a liquid turns into a vapor when it is heated to its boiling point

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4
Q

What is evaperation

A

The process where an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils

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5
Q

What is condensing

A

When a gas turns to a liquid

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6
Q

What is sublimation

A

When a substance changes from a solid phase to a gas phase without turning into a liquid

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7
Q

What is deposition

A

When a gas turns into a solid without turning into a liquid

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8
Q

What are the three parts of an atom

A

Proton, neutron and electron

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9
Q

What is the charge of a neutron

A

Neutral eletric charge (neither posative nor negative)
0

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10
Q

Relative mass of an electron

A

1

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11
Q

What is the charge of a proton

A

+1

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12
Q

What is the charge of an electron

A

-1

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13
Q

What is a group on the periodic table

A

The vertical collums are called groups

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14
Q

What are periods in a periodic table

A

The horizontal rows

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15
Q

What is an element

A

A substance made up of only one sort of atom

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16
Q

What is a compound

A

A substance made up of 2 or more different elements that have been chemically joined

17
Q

What is a mole

A

the Avogadro constant number of particles (which is 6.02 × 10 23 )

18
Q

What is Avogadro’s number

A

6.02 x 10^23

19
Q

Relative mass of an electron

A

Almost zero 0.0005

20
Q

What is the atomic number

A

The number of protons in the nucleus of an atom or element (the smaller number of the two on the periodic table most of the time)

21
Q

Mass number

A

is the larger of the two numbers shown in most periodic tables, the sum of the protons and nuetrons in an atom’s nucleus is the mass number.

22
Q

Mixture

A

2 or more elements/compounds mixed together but not joined

23
Q

What symbol is hydrogen

A

H

24
Q

What symbol is sodium

A

Na

25
Q

What symbol is calcium

A

Ca

26
Q

What symbol is sulfur

A

S

27
Q

What symbol is helium

A

He

28
Q

What symbol is iron

A

Fe

29
Q

What symbol is chlorine

A

Cl

30
Q

What symbol is magnesium

A

Mg

31
Q

What symbol is zinc

A

Zn

32
Q

What symbol is gold

A

Au

33
Q

What symbol is potassium

A

K

34
Q

What does di mean

A

2 e.g. dioxide 2 oxygen

35
Q

Mon

A

1 e.g. nitrogen monoxide

36
Q

Tri

A

3 e.g. supher trioxide

37
Q

What is a covalent bond

A

Shaired pair(s) of electrons between two atoms

Chemestry Year 9 (1 decks)

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