MEDIUM
Lower Secondary Stage 9
IMPORTANT
Earn 100

Draw a diagram to show the electron shells in a silicon atom. Explain how the structure relates to silicon's position in the periodic table.

Important Questions on The Periodic Table

MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 7>Q 5
Give the name and symbol of an element that is a soft metal and reacts with water to make an alkaline solution.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 7>Q 5
Give the name and symbol of an element that is an unreactive gas that glows when electricity is passed through it.
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 7>Q 6
Write the word equation for the reaction of potassium with water.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 8>Q 7
When elements react with other elements their atoms form a full outer shell of electrons. Use this information to suggest why the noble gases are unreactive.
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 9>Q 8
Rubidium is the fourth element in Group 1. Predict what you would observe when rubidium is added to some water. Give a reason for your answer. 
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 9>Q 9
Describe the trend in the melting points and boiling points of the Group 1 elements. 
MEDIUM
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 9>Q 10
Caesium is in Period 6 in Group 1. Would you expect caesium to have a higher or lower melting point than rubidium? Give a reason for your answer.
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 10>Q 11
Write the word equation for the reaction between hydrogen and chlorine.