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SLE133 Chemistry In Our World > Topic 1 The Nature Of Matter > Flashcards

Topic 1 The Nature Of Matter Flashcards

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1
Q

What is Chemistry?

A

The study of the nature, properties and transformation of matter.

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2
Q

What is Matter?

A

Anything that has mass and occupies space.

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3
Q

What are Physical Changes?

A

Changes that do not affect the chemical makeup of a substance or object.

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4
Q

What are Chemical Changes?

A

Changes during which chemical bonds are broken and/or formed.

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5
Q

What are Atoms?

A

Building blocks of Matter composed of neutrons, potons and electrons.

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6
Q

How many Elements have been identified?

A

118

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7
Q

What determines the size of an atom?

A

Electrons.

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8
Q

What determines the weight of an atom?

A

Its nucleus.

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9
Q

What is a Molecule?

A

The smallest particles that retain all the properties of a substance, composed of two or more atoms.

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10
Q

What are two types of Covalent Bonds?

A

Polar and non-polar.

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11
Q

What are Cations?

A

Positively charged ions.

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12
Q

What are Anions?

A

Negatively charged ions.

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13
Q

How are ions formed?

A

The addition or removal of one or more electrons.

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14
Q

What are Compounds?

A

Substances made up of two or more elements.

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15
Q

What configuration do all elements want to achieve?

A

Noble Gas configuration.
A full electron shell and neutral charge.

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16
Q

What is a Phase Change?

A

The physical process of transition between one state and another.

17
Q

What is Sublimination?

A

The conversion of a substance from a gas to a solid.

18
Q

What are the characteristics of Solids?

A

Fixed volume
Fixed shape.
Cannot be compressed.
Atoms are normally arranged in a regular pattern close together.

19
Q

What are the characteristics of Liquids?

A

Fixed volume.
Change shape to fit their container.
Cannot be compressed.
Atoms are close together but not in an organised arrangement.

20
Q

What are the characteristics of Gases?

A

Varied volume.
Expand to fit their container.
Can be compressed easily.
Atoms are free moving and far apart.

SLE133 Chemistry In Our World (10 decks)

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