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Chemistry > Test Q&A > Flashcards

Test Q&A Flashcards

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1
Q

What is an atom?

A

Tiny particles that have a mass

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2
Q

What is an element?

A

A substance made from atoms with the same number of protons

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3
Q 
What are the symbols for:
Oxygen
Sodium 
Hydrogen
Lithium 
Copper
Potassium 
Argon 
Calcium
A 
O
Na 
H
Li
Cu
K
Ar 
Ca
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4
Q

What is the charge of a:
Proton
Neutron
Electron

A

Positive
No charge
Negative

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5
Q

What is the mass of a:
Proton
Neutron
Electron

A

1
1
Negligible

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6
Q

Why do atoms have no overall electrical charge?

A

The number of protons is the same as the number of electrons

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7
Q

What does the atomic number tell you?

A

The number of protons in an atom

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8
Q

What does the mass number tell you?

A

The number of protons and neutrons in an atom

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9
Q 
What is the symbol for:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron
A 
H
He
Li
Be
B
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10
Q 
What is the atomic number of:
Hydrogen 
Helium
Lithium
Beryllium 
Boron
A 
1
2
3
4
5
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11
Q 
What is the mass number of:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron
A 
1
4
7
9
11
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12
Q 
What is the number of protons in:
Hydrogen
Helium
Lithium 
Beryllium 
Boron
A 
1
2
3
4
5
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13
Q 
What is the number of neutrons in:
Hydrogen 
Helium 
Lithium 
Beryllium 
Boron
A 
0
2
4
5
6
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14
Q 
What is the number of electrons in:
Hydrogen 
Helium
Lithium 
Beryllium 
Boron
A 
1
2
3
4
5
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15
Q 
How many electrons in the outer shell of an element in group:
1
2
3
4
5
6
7
0
A 
1
2
3
4
5
6
7
8
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16
Q

What is a period?

A

A row across the periodic table

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17
Q

Why do elements in the same group have similar properties?

A

They have the same number of electrons in their outer shell

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18
Q

Where are transition metals on the periodic table?

A

The middle

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19
Q

Where are alkali metals on the periodic table?

A

The first column

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20
Q

Where are halogens on the periodic table?

A

The right side

21
Q

Where are noble gases on the periodic table?

A

The last column

22
Q

What is the word equation for CaO + CO2 > CaCO3

A

Calcium oxide + Carbon dioxide > Calcium Carbonate

23
Q

How many of each element is there in:
CaCO3
CaO
CO2

A

1 calcium, 1 carbon, 3 oxygens
1 calcium, 1 Oxygen
1 Carbon, 2 Oxygens

24
Q

Why does calcium chloride, an ionic compound, have a high melting point?

A

Because it has strong attractions between the ions

25
Q

Why is oxygen a gas at room temperature?

A

The forces between the molecules are weak

26
Q

What is a polymer?

A

Molecules made up of long chains of covalently bonded carbon atoms

27
Q

What is an ion?

A

A charged particle

28
Q

What type of bonding occurs between metals and non-metals?

A

Ionic bonding

29
Q

What type of bonding occurs between two non-metals?

A

Covalent bonding

30
Q

Do metals gain or lose electrons when forming ions? Positive or negative ion?

A

Lose

Positive

31
Q

Do nom-metals gain or lose electrons when forming ions? Positive or negative ion?

A

Gain

Negative

32
Q

What does malleable mean?

A

Can be bent into shape

33
Q

What properties of copper make it good for electrical wiring?

A

Very good conductor of electricity and not very reactive

34
Q

What properties of copper make it good for plumbing?

A

Easily bent into shape and not very reactive

35
Q

What is an isotope?

A

A different form of an element with the same number of protons but a different number of neutrons

36
Q

What are fullerenes?

A

Molecules of carbon shaped like closed tubes or hollow balls

37
Q

Describe the basic structure of graphite

A

3 covalent bonds
Arranged in hexagons
No covalent bonds between layers
Delocalised electrons

38
Q

Describe the basic structure of diamond

A

4 covalent bonds
Strong covalent bonds
No free electrons

39
Q

Why are fullerenes good industrial catalysts?

A

They have a huge surface area

40
Q

What is chromatography used for?

A

A method to separate a mixture of soluble substances and identify them

41
Q

Name 3 different sources of water that can be made portable

A

Surface water
Ground water
Waste water

42
Q

What is deionised water?

A

It has the ions present in tap water removed

43
Q

What is the chemical definition of purity?

A

A substance made up of a single element or compound

44
Q

Describe how to carry out filtration

A

Used when the product is an insoluble solid, using filter paper and a funnel you can separate the solid from the liquid. The liquid runs through and the solid is left behind in the filter paper

45
Q

What separation technique should you use to separate a soluble solid from solution?

A

Crystallisation

46
Q

What happens to the forces between the particles in a solid as you melt it?

A

Particles gain more energy, increases vibrations and weaken the forces

47
Q

What is the ph value of a neutral substance?

A

7

48
Q

What is the ph value of an acid substance?

A

Anything from 1-6

Chemistry (8 decks)

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