HARD
9th CBSE
IMPORTANT
Earn 100

What are isobars? Explain with an example.

Important Questions on Structure of Atom

HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Short Answer Type Questions>Q 30
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Short Answer Type Questions>Q 31
An element has Z = 7. What is the valency of the element? Also name the element.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 32
What are valence electrons? Where are valence electrons situated in an atom?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 32
What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 33
What are isotopes? Explain by giving an example.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 33
Give one similarity and one difference between a pair of isotopes.
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 33
Give the number of protons, neutrons and electrons per atom in the two isotopes of chlorine Cl1735 and Cl1737. 
HARD
9th CBSE
IMPORTANT
Science for Ninth class Part 2 Chemistry>Chapter 4 - Structure of Atom>Long Answer Type Questions>Q 34
What are radioactive isotopes? Give two examples of radioactive isotopes.