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Year 8 Science > 8F - The periodic Table > Flashcards

8F - The periodic Table Flashcards

1
Q

Atoms in one element are…

A

the same.

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2
Q

Atoms of different elements are…

A

different types

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3
Q

What happens during chemical reations?

A

Elements and compounds combine.

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4
Q

What is caused by the energy released in the air by chemical reactions?

A

This makes rocket fly into the air, bangers explode and shells produce starburst of bright light.

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5
Q

What is an Atom?

A

The smallest unit of an element

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6
Q

What makes up all matter?

A

Atoms

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7
Q

What is a mollecule?

A

Two or more of the atoms of the same type of elements.

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8
Q

What is a n element?

A

It is made of the same type of atoms.

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9
Q

What is a compound?

A

Two or more different types of elements chemically bonded together.

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10
Q

What is a mixture?

A

Two or more different types of elements and or compound that are not chemically bonded together.

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11
Q

What is a noble gas?

A

Elements in group 8

Exist as single atoms

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12
Q

What do all partials in a particular element have in common?

A

They are all have the same type of atoms.

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13
Q

What is different about all atoms?

A

All atoms have different masses unless they have the same elements.

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14
Q

What is different between a compound and a mixture?

A

The particles in a mixture are not chemically bonded but in a compound they are.

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15
Q

What happens to atoms?

A

They cannot be destroyed or made?

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16
Q

What is important to remember when writing a chemical reations?

A

What goes in must come out.

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17
Q

What happens in a compounds?

A

The elements are broken apart so that they can chemically bond together to for new substances.

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18
Q

Electricity can pass through iron…

A

because it is a conductor of electricity.

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19
Q

Elements are substances…

A

that contain only one kind of atom.

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20
Q

Sulfur will turn from a liquid into a gas…

A

at its boiling point.

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21
Q

The symbols of iron and sulfur are…

A

are Fe and S.

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22
Q

Iron and sulfur are examples of…

A

of elements.

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23
Q

Iron is used to make bridges…

A

because it is strong.

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24
Q

Iron sulfide is a solid at room temperature…

A

as its melting point is high.

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25
Iron sulfide is a compound...
because it contains different atoms joined together.
26
Compounds are different from the elements they are made from..
different types of atoms.
27
All substances are made of...
tiny particles called atoms.
28
What is a solid to a liquid?
It is melting.
29
What is a liquid to a solid?
It is freezing.
30
What is a liquid to a gas?
It is a boiling.
31
What is a gas to a liquid?
It is condensing
32
What is a physical change?
A change that is usually reversable and does not change the substance.
33
What is an example of a physical change?
Evaporation condensing melting sublimation freezing deposition
34
What is a chemical reactions?
It is not reversable and changes the composition and type of substance at the molecular level.
35
What is an example of a chemical reaction?
Methane + oxygen ------> carbon dioxide +water
36
What is a property ?
characteristic or attribution of a substance.
37
What is a physical property?
Something that we can see, feel or measure easily.
38
Example of a physical change?
Colour change shape state of matter malleability melting/ boiling point density conductivity
39
Examples of chemical changes?
reactivity flammability
40
What are signs or reactions?
gas being produced smoke bubbles fizzing sound/noises colour change fire sparks heat being produced change in pH
41
… contain atoms of different elements joined together.
Compounds...
42
During chemical reactions atoms are rearranged, to make...
new substances.
43
In chemical reactions...
… a new substances is formed.
44
In physical reactions
… no new substances are formed.
45
Change of state..
… are example of physical changes.
46
Flammability is...
… a chemical property
47
Melting and boiling points are...
… a physical property
48
Conductivity of electricity is...
… a physical property
49
The pH of a solution is...
… a chemical property
50
What can elements be?
Metals Non-metals
51
How small are atoms?
Atoms are so tiny. Atoms cannot be seen.
52
What are two of the properties of sulfur?
It is a yellow solid. It does not conduct electricity.
53
What type of substance is Iron oxide?
It is a compound. I contains iron and oxygen.
54
What is a triad?
It is a group of three elements that have similar properties.
55
What is an important thing about chemical properties?
The chemical properties of elements in the same groups are similar these elements from the same group are compounds.
56
What is an important thing about chemical properties?
WhaThe chemical properties of elements in the same groups are similar these elements from the same group are compounds.
57
What is a period?
It is a horizontal line across the periodic table.
58
What is common about all the elements in the same group?
The all have similar chemical properties.
59
What to remember about physical properties?
All metals have similar physical properties. Metals and non-metals have different properties.
60
What is a trend?
A pattern or a tendency that increase/ decrease/ stay the same in the series of data.
61
How to write what the trend between two substances is?
The _____________________ from _______________ (____) to _______________ (____) ( increases/ decrease) The The _____________________ from _______________ (____) to _______________ (____) ( increases/ decrease)
62
What happens when metals react with oxygen?
They form metal oxides.
63
What is common with chemical properties of element in the same group?
Elements in the same group of the periodic table have similar chemical properties (react in the same way) and form similar compounds.
64
What is reactivity?
How reactive something is. The property of participating in chemical reaction. The more reactive the more violent and quick the reaction is

Year 8 Science (7 decks)

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