8F - Revision

According to Dalton's theory, elements:

• are always solids

• contain only one kind of atom

• can be split up into simple substances

• contain at least two different types of atom

Which of these diagrams shows the particles in a compound?

• A

• B

• C

• D

Which of these diagrams shows the particles in a mixture?

• A

• B

• C

• D

When magnesium ribbon reacts with steam a solid called magnesium oxide and hydrogen gas are formed.

Which of the following completes the word equation for this reaction which starts:

magnesium + ...

• hydrogen -> magnesium + water

• water -> magnesium oxide + hydrogen

• water -> magnesium + hydrogen

• magnesium oxide -> hydrogen + water

The correct symbol for Iron is

• I

• Ir

• Fe

• fe

The correct symbol for Chlorine is

• C

• Cl

• Ch

• Ce

Which two elements in the periodic table below would have the most similar properties?

• 1 & 4

• 1 & 6

• 2 & 3

• 5 & 6

Which element is very unreactive?

• helium

• hydrogen

• lithium

• flourine

Which of the following describes a group 1 element?

• a very reactive metal

• a very unreactive metal

• a very reactive non-metal

• a very unreactive non-metal

The elements were arranged in the periodic table in order of increasing:

• density

• melting point

• reactivity

• masses of atoms