States of Matter
What are the three states of matter?
Solids, liquids and gases
What is the name of the change from solid to liquid?
Melting
What is the table called that shows all known elements?
The periodic table
What group are the alkali metals in?
Group 1
What does an element contain?
Only one type of atom
Which state of matter has a fixed shape and fixed volume?
Solid
What is the change from liquid to gas called?
Evaporation.
What number is the periodic table arranged by?
Atomic number
Why are alkali metals stored in oil?
To stop them reacting with air or water
Is water an element or a compound?
Compound
Which state can flow but cannot be easily compressed?
Liquid
What change happens when a gas turns back into a liquid?
Condensing
What do elements in the same group have in common?
Similar properties
What group are the halogens in?
Group 7
Which of these elements is a member of the halogens?
Bromine
Why can gases be compressed easily?
The particles are far apart
What happens to particle energy when a substance is heated?
Particles gain energy and move faster
What are the vertical columns in the periodic table called?
Groups
What is special about bromine at room temperature?
It is a liquid
Name the two components (parts) that make up the nucleus of the atom?
Protons and Neutrons
Explain why solids cannot flow.
Particles are very close together and only vibrate in fixed positions
Describe how you could turn ice into water and then into gas.
Heat the ice to melt it, then continue heating to evaporate it
The scientist who is best known for organising the elements into the periodic table
Dmitri Mendeleev
Describe the trend in reactivity in Group 7.
Reactivity decreases down the group
What element has the symbol K?
Potassium