Properties and Structure of Materials Flashcards Preview

Chemistry Yr 11 > Properties and Structure of Materials > Flashcards

Flashcards in Properties and Structure of Materials Deck (127)
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1

Define nanomaterials.

Substances that contain particles in the size range of 1-100 nm.
They have specific properties relating to the size of these particles which may differ from those of the bulk material.

2

Define matter.

It has mass and occupies space.
All substances are made up of elements, compounds or mixtures.

3

Define pure substances.

Homogenous matter with a definite fixed composition.
Examples are both elements and compounds.

4

5 examples of pure substances.

Fe, N₂, CO₂, HCl, H₂O

5

Define elements.

Pure substances made entirely of atoms of one element.
Cannot be separated into similar substances by chemical change.

6

4 examples of elements.

Ne, Al, Br₂, S₈

7

Define compounds.

Pure substances composed of two or more different elements chemically combined in fixed proportions.

8

4 examples of compounds.

CO₂, HF, C₆H₁₂O₆, H₂O

9

Define mixture.

A substance that contained 2 or more pure substances.

10

Define solution.

Also called homogeneous mixtures.
A mixture of constant bc imposition and properties throughout.

11

4 examples of solutions.

Air, seawater, stainless steel, smoke

12

Define heterogeneous mixtures.

Mixtures that have variable composition and properties throughout.

13

3 examples of heterogeneous mixtures.

Granite, soil, concrete

14

Define reactants.

Substances that exist before a chemical reaction.

15

Define products.

Substances formed as a result of a chemical reaction.

16

Define molecules.

A group of atoms bonded together, forming a small independent group.
Both elements and compounds exist as molecules.

17

2 examples of molecules.

N₂, CO₂

18

Define physical properties.

Properties of a substance that can be determined without changing the chemical composition.

19

3 examples of physical properties.

Boiling point, odour, colour

20

Define chemical properties.

Properties of a substance that relate to the ability of the substance to form new substances.

21

3 examples of chemical properties.

Ability to react with water, oxygen or acids

22

Define boiling point.

The temperature at which the vapour pressure of a liquid is equal to surrounding atmospheric pressure.

23

Define melting point.

The temperature at which a solid changes state into a liquid

24

Define hardness.

A measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied.

25

Define solubility.

The ability of any substance to dissolve in a solvent to form a homogenous solution.

26

Define conductivity.

A measure of the ability of a substance to conduct an electric current.

27

Define malleability.

The ability of a material to be beaten into a sheet.
Metals tend to be malleable, other materials tend do be brittle.

28

Define ductility.

The ability of a material to be drawn in to a wire.

29

Define lustre.

The ability of a substance to reflect light.

30

Define density.

The mass per unit volume of a substance.