MEDIUM
9th CBSE
IMPORTANT
Earn 100

Chlorine atom is electrically neutral but chloride ion is charged. Explain.

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 47
Write the name of the sub-atomic particle discovered by J. Chadwick. What type of charge occurs on this particle? In which part of atom this particle is located?
HARD
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 47
List three steps of experiment performed by Rutherford for his model of an atom
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 47
Define isobars, write its one example.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 47
Which scientist concluded that size of nucleus is very small as compared to size of an atom? (J.J. Thomson / Rutherford / Bohr)
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 48
What is an octet? How do elements reach an octet?
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 48

Make a schematic atomic structure of Magnesium or Phosphorus.

(Given: number of protons of Magnesium 12, Phosphorus 15). 

MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 49
What are isobars? Give one example. 
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 4 - Structure of the Atom>ASSESS YOURSELF>Q 49
Write two differences between isobars and isotopes.