EASY
9th CBSE
IMPORTANT
Earn 100

The number of neutrons and protons present in the nuclei of two atomic species A and B are given below.
Atomic Species A B
Protons 8 8
Neutrons 8 10

Write the electronic configuration of atoms A and B

Important Questions on Structure of the Atom

MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 18
What information do you get from the figure given below about the atomic number, mass number and valency of atom X ?
Question Image
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 19
A certain species X has 17 protons, 18 electrons, and 20 neutrons.
What is such a particle called?
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 19
A certain species Xhas 17 protons, 18 electrons, and 20 neutrons.
What is the mass number of X.
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 19
A certain species X has 17 protons, 18 electrons, and 20 neutrons.
What is the atomic number of X.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 20
If K and L-shells of an atom are full and in M-shell, there is only one electron, then what would be the total number of electrons in the atom? Name the element. Write the symbol and draw the Bohr model.
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 21
The atom of an element has 17 protons, 17 electrons, and 18 neutrons.
Calculate the mass number of the element.
EASY
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 21
An atom of an element has 17 protons, 17 electrons, and 18 neutrons.
Write its electronic configuration.
MEDIUM
9th CBSE
IMPORTANT
All In One SCIENCE CBSE Class IX>Chapter 4 - Structure of the Atom>CHAPTER EXERCISE>Q 21
An atom of an element has 17 protons, 17 electrons, and 18 neutrons.
Find the valency and atomic number of the element.