MEDIUM
8th CBSE
IMPORTANT
Earn 100

Anode rays are also produced along with cathode rays in the discharge tube under low pressure. Justify.

Important Questions on Atomic Structure

HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 58
Cathode rays are deflected in electric and magnetic fields. But they are made to pass straight in Thomson's experiment. How do you account for this?
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 59
If the maximum permissible orbits of elements in nature are limited to n=4, what are the number of possible elements?
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 60
A metallic element forms an ion with unit charge. The ion has 10 electrons and 12 neutrons . What is the number of electrons, protons and neutrons in its neutral atom? Represent the atom with atomic number and mass number.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 61
Nuclear charge of an element B is twice that of A. If A has two completely filled orbits and L shell is its outermost orbit, find out atomic numbers of A and B.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 62
The number of electrons in a di-positive ion of an element X is 18. If the mass number of X is 4 units more than twice the number of electrons of its ion, calculate of protons, electron and neutrons in X.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 63
Rutherford's α-ray scattering experiment was conducted in order to test the validity of Thomson's model. What results were expected from this experiment?
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 64
If the average atomic mass of chlorine 35.5, then find the percentage abundance of the two isotopes of chlorine which have the mass number 35 and 37.
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 65
The electronic configuration of an atom A is a, a+b, a+2b, a and that of B is a, a+b, 3a+2b, b. Write the electronic configuration of A and B.