EASY
Lower Secondary Stage 9
IMPORTANT
Earn 100

Suggest why the neutron was the last particle to be discovered.

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 4>Q 5

Look at the information about four different atoms.

O816 Oxygen

Na1123 Sodium

Be49 Beryllium

He24 Helium

a) Which atom has an atomic number of 4? 
b) How many protons does an atom of oxygen have? 
c) How many electrons does an atom of helium have? 
d) How many neutrons does an atom of sodium have?

 

EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 1
How many groups are there in the periodic table?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 2
In which group is oxygen found?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 2
In which group is chlorine found?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 2
In which group is magnesium found?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 3
In which period argon is found?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 3
In which period calcium is found?
EASY
Lower Secondary Stage 9
IMPORTANT
Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 5 - The Periodic Table>Exercise 6>Q 3
In which period carbon is found?