MEDIUM
Lower Secondary Stage 9
IMPORTANT
Earn 100
Put the letters A-D in the correct order for these models of the atom - earliest first.
A - Plum pudding model
B - Atoms as solid spheres
C - Atoms with electron shells
D - Rutherford's model
B - Atoms as solid spheres
C - Atoms with electron shells
D - Rutherford's model
Important Questions on The Periodic Table
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Name two elements with properties similar to calcium.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Explain why an atom has no overall charge.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
An aluminium atom has the atomic number 13 and a mass number of 27.
State how many electrons, protons and neutrons the atom has.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
An aluminium atom has the atomic number 13 and a mass number of 27.
Draw a diagram of the atom, showing the electrons in their shells.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
An aluminium atom has the atomic number 13 and a mass number of 27.
State what period and group aluminium is in the Periodic Table. Explain how you can use its electron structure to work this out.
EASY
Lower Secondary Stage 9
IMPORTANT
Use what you know about how electrons are arranged in atoms to explain why elements in the same group share similar properties.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
The model of the atom has changed over time. Explain why this is so.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
The gold foil experiment performed by Rutherford and his team was repeated many times by them and by other scientists. Suggest why this is important.
