EOU2 MATERIALS AND THEIR STRUCTURE

Which of these materials will have similar properties?

• air, oxygen, ice

• water, iron, air

• iron, stone, wood

• oil, water, wood

Descriptions of two different states of matter are shown below.

X: the molecules are very close together, in fixed positions. They vibrate around fixed positions.

Y: the molecules move rapidly and randomly in straight lines until they colldile with something. The molecules are spaced very far.

• State X: Solid

  State Y: Liquid

• State X: Solid

  State Y: Gas

• State X: Liquid

  State Y: Gas

• State X: Gas

  State Y: Liquid

Name of the process G.

(a)  

The diagrams below represent the arrangement of atoms and molecules in four different substances, A, B, C and D.

Which substance is a pure substance​?​ (a)  

Which substance is a mixture of two compounds?​ (b)  

Which substance would you expect to find in the periodic table?​ (c)  

Which substance is most likely to be water?​ (d)  

• A

• C

• D

• B
• A
• D

Match each materials to its correct description.

a pure substance containing the same type of atom

• element

• compound

• alloy

What is compound ?

• a pure substance containing two differents types of metal atoms

• substance containing atoms that are free to move

• a mixture containing two diffferent type of metal atoms

• a mixture containing atoms that are free to move

What is alloy ?

• a pure substance containing two differents types of metal atoms

• substance containing atoms that are free to move

• a mixture containing two diffferent type of metal atoms

• a mixture containing atoms that are free to move

The fomula for sulfur dioxide is SO₂

How many differnet elements are combined in sulfur dioxide?

• 4
• 2
• 3
• 1

The fomula for sulfur dioxide is SO₂

How many atoms of oxygenare combined with each atom of sulfur?

• 1

• 2
• 3
• 4

Methane can be a gas, liquid, solid in the diagram below.

Arrow P, Q, R and S represent change of state.

Which arrow reoresent

i evaporating ​ (a)  

ii melting ​ (b)   ​

• P
• R
• S
• Q