HARD
8th ICSE
IMPORTANT
Earn 100

The electronic configuration of two elements X and Y are given below

Question Image

where p = proton, n = neutron, e = electron. When these two elements combine together to form a compound, give the mass (in grams) of one mole of this compound.

Important Questions on Atomic Structure

EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q A
What do you understand by the term atom'?
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q A
Define the term molecule.
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q A
Why are atoms called building blocks of matter?
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q A
Name the philosophers who have attempted to give model of an atom.
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q A
Describe the main postulates of the Dalton's atomic theory.
EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q B
What do you understand by the terms atomic number and mass number of the elements?
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q B
Atomic number of an element is 8. What does it tell about the element from this?
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 4 - Atomic Structure>Check Point>Q B
The atomic number of an element is 92 and the mass number is 238. Calculate the number of subatomic particles of the atom.