EASY
9th CBSE
IMPORTANT
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Atoms of most elements are not able to exist independently. Then how these atoms form the matter then we can feel, see or touch?

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 9
It is said that molecules of many elements, such as argon, helium, neon, etc. are made up of only one atom of that element why is it so?
EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 10
The atoms of elements such as helium, neon, argon, radon, etc. do not form ions easily why is it so?
EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 11
Why valency of an element is considered very important?
MEDIUM
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 12
Give difference between an atom and an ion.
EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 13
Differentiate between cation and an anion.
EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 14

What is mean by:

Molecular mass

EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 14

What is meant by chemical formula?

EASY
9th CBSE
IMPORTANT
EVERGREEN Self-Study in SCIENCE>Chapter 3 - Atoms and Molecules>CHAPTER TEST>Q 14

What is mean by :

Mole