HARD
9th Tamil Nadu Board
IMPORTANT
Earn 100

Draw the model of the pair of isotones of Aluminium and Silicon.

Important Questions on Atomic Structure

HARD
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>activity 6>Q 1
Nitrogen combines with hydrogen to form ammonia NH3. Illustrate Gay Lussac's law using this example.
MEDIUM
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q i
Among the following, the odd pair is 
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q i
Change in the number of neutrons in an atom changes it to 
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q i
The term nucleons refer to
HARD
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q i
The number of protons, neutrons and electrons present respectively in Br3580 are
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q i
The correct electronic configuration of potassium is 
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q ii

State whether true or false. If false, correct the statement.

In an atom, electrons revolve around the nucleus in fixed orbits.

EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 11 - Atomic Structure>textbook exercises>Q ii

State whether true or false. If false, correct the statement.

Isotopes of an element have different atomic numbers.