HARD
8th Maharashtra Board
IMPORTANT
Earn 100
Atomic numbers (Z) of some elements are given here. Write down the number of electron present in the outermost shell of each of them.
Element
H
C
Na
Cl
N
Z
1
6
11
17
7
Number of electrons in
the outermost shell
Number of electrons in
the outermost shell
Important Questions on Inside the Atom
HARD
8th Maharashtra Board
IMPORTANT
The number of electrons of some elements is given here. By using it write the electronic configuration, number of valence electron and valency of the respective elements.
| Element | Li | C | Mg | O |
| Number of electrons | 3 | 6 | 12 | 8 |
| Electronic configuration | ||||
| Number of valence electrons | ||||
| Valency |
EASY
8th Maharashtra Board
IMPORTANT
HARD
8th Maharashtra Board
IMPORTANT
EASY
8th Maharashtra Board
IMPORTANT
What is the difference in the atomic models of Thomson and Rutherford?
EASY
8th Maharashtra Board
IMPORTANT
What is meant by Valency of an element? What is the relationship between the number of valence electron and valency?
MEDIUM
8th Maharashtra Board
IMPORTANT
HARD
8th Maharashtra Board
IMPORTANT
What is meant by sub-atomic particle? Give brief information of three sub-atomic particles with reference to electrical charge, mass and location.
