End of Chapter Review
Lucy Hawkins Science Solutions for Exercise - End of Chapter Review
Simple step-by-step solutions to End of Chapter Review questions of The Periodic Table from Cambridge Lower Secondary Science Stage 9: Student's Book. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from End of Chapter Review with Hints & Solutions
An aluminium atom has the atomic number 13 and a mass number of 27.
State how many electrons, protons and neutrons the atom has.
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.
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.
Use what you know about how electrons are arranged in atoms to explain why elements in the same group share similar properties.
The model of the atom has changed over time. Explain why this is so.
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.
The table shows the boiling points of some of the Group 8 elements.
| Name | Boiling point() |
| Helium | |
| Neon | |
| Argon | |
| Krypton | |
| Xenon | |
| Radon |
a) Describe the trend in data.
b) Estimate the boiling point of Krpton.
Rajeev read on a website that 'Mendeleev invented the periodic table we use today'. Discuss the arguments for and against this statement.
