With the help of Table 4.1, find out the mass number of oxygen... - Science

Question

With the help of Table 4.1, find out the mass number of oxygen and sulphur atom.

Answer

1. Oxygen:

2. Sulphur:

What are canal rays?

If an atom contains one electron and one proton, will it carry any charge or not?

On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole.

On the basis of Rutherford's model of an atom, which sub-atomic particle is present in the nucleus of an atom?

Draw a sketch of Bohr's model of an atom with three shells.

4. What do you think would be the observation if the $\alpha$ -particle scattering experiment is carried out using a foil of a metal other than gold?

Name the three sub-atomic particles of an atom.

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

Write the distribution of electrons in carbon and sodium atoms.

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

Subject: Science
Class: class 9
Chapter 4: Structure of the Atom
Medium: English Medium