EASY
9th ICSE
IMPORTANT
Earn 100

Name the element which does not contain neutrons in its nucleus.

Important Questions on Atomic Structure

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 19
Give two differences between sodium atom and sodium ion.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 19

Elements A, B and C have atomic numbers 9,20, and 10 respectively.

State which one is (i) a non-metal; (ii) a metal and (iii) chemically inert.

EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 19
Define: Proton, Neutron and Electron.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 20
What is the significance of the number of protons found in the atoms of each of the different elements?
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 20
What is the relation between the number of protons and the number of electrons in an atom?
HARD
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 4 - Atomic Structure>Questions>Q 20

What would be the reason for an element to have atoms with different mass numbers?

Element Atomic No. Mass No. No. of Protons No. of Neutrons No. of Electrons
Beryllium 4 9      
Fluorine 9     10  
Sodium       12 11
Aluminium   27     13
Phosphorus   31 15    

Complete the above table relating to the atomic structure of the elements.