EASY
8th Maharashtra Board
IMPORTANT
Earn 100

A sodium atom contains 11 electrons. What is the atomic number of sodium? 

Important Questions on Inside the Atom

EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Use your brain power>Q 4
The atomic number and mass number of magnesium are 12 and 24 respectively. How will you show this by the convention symbol? 
EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Use your brain power>Q 5
The atomic number and mass number of calcium are 20 and 40 respectively. Deduce the number of neutrons present in the calcium nucleus.
HARD
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Complete the table
Complete the table:
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MEDIUM
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Can you recall?

Use the following molecular formulae to determine the valencies of H,Cl,O,S,N,C,Br,I,Na.

Molecular formulae of H2, HCl, H2O, H2S, NH3, CH4, HBr, HI, NaH.

 

EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Can you tell?>Q 1
There is a similarity in the atomic structure and solar system. The planets revolve around the sun due to the gravitational force. Which force might be acting in the atomic structure? 
EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Can you tell?>Q 2
Positively charged proton are together in the nucleus. What might be, one of the function of the neutrons in the nucleus?
EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Use your brain power>Q 1
What are the symbols used for the shells which accommodate the electrons in various atoms? 
EASY
8th Maharashtra Board
IMPORTANT
General Science>Chapter 5 - Inside the Atom>Use your brain power>Q 2
What is the symbol and an ordinal number of the innermost shell?