MEDIUM
9th CBSE
IMPORTANT
Earn 100

What are isobars? Give an example. Do isobars exhibit similar chemical properties?

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 32
Why is it that most elements have fractional atomic mass?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 33
How will you justify the atomic mass of chlorine as 35.5 u?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 34
Calculate the average atomic mass of chlorine using the following data:
Isotope    Natural abundance (%)    Molar mass
35 Cl                75.77                         34.9689
37 Cl                24.23                          36.9659
 
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 35
The charge of neutron is _____.(write number)
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 35
Neutron was discovered by _____.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 35

The radius of nucleus is of the order of _____ cm. A: 10-9, B: 10-13, C: 10-7

(Enter your correct answer as A, B or C)

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 35
The protons and neutrons are collectively called _____. (nucleus / nucleons)
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 4 - Structure of the Atom>CHECK YOUR PROGRESS>Q 35

The volume of the nucleus of an atom is _____ than the volume of extra-nuclear part of the atom.