HARD
9th Kerala Board
IMPORTANT
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Analyse the electronic configuration of elements from atomic number 1 to 18 in the following table;

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What is the maximum number of electrons that can be accommodated in L shell?

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Important Questions on Structure of Atom

MEDIUM
9th Kerala Board
IMPORTANT

Complete the following table regarding the filling up of electrons in shells.

Name of Shells Number of Shells Maximum number of electrons
K 1 2×12 =2
L 2 2×22 =8
M 3 -------
N ---- -------

 

MEDIUM
9th Kerala Board
IMPORTANT

Find the electronic configuration of the following atoms and draw their Bohr model.

N714Mg1224S1632.

MEDIUM
9th Kerala Board
IMPORTANT

The symbol of the aluminium atom is Al1327. Bohr model of the atom is given in the figure; analyse this and complete the table.

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Atomic Number                            
Mass Number  
Number of Protons  
Number of Electrons  
Number of Neutrons  
Electronic configuration  

 

MEDIUM
9th Kerala Board
IMPORTANT

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Complete the following table providing details related to these atoms.

Name of Atom Protium Deuterium Tritium
Number of Protons      
Number of Neutrons      
Number of Electrons      
Atomic Number      
Mass Number      

 

MEDIUM
9th Kerala Board
IMPORTANT

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Which is the particle that differs in its number in these atoms?

HARD
9th Kerala Board
IMPORTANT

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What interference can you arrive at when the mass number and an atomic number of these elements are examined?

MEDIUM
9th Kerala Board
IMPORTANT

Symbols of certain elements are given in the table. Complete the table writing there atomic number, mass number, number of protons, electrons and neutron.

Symbol Atomic Number  Mass Number Protons Electrons Neutrons
O815          
O816          
O817          

 

HARD
9th Kerala Board
IMPORTANT

The atomic number of an atom Z= 17, mass number A= 35.

Find the number of protons, electrons and neutrons in the atom.