Q3 of 23 Page 34

Answer the following:

Define the term ‘isotope’ of an atom with a suitable example.

Isotope: Atoms of an element with different mass numbers are called isotopes.


Number of protons + Number of neutrons = Mass number


For example: Hydrogen has three isotopes:




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3

Answer the following:

List the three fundamental particles and their properties.

 3

Answer the following:

Define the terms atomic number and mass number of an element.

 3

Answer the following:

From the symbol 19K40. write the following


1.mass number of Potassium


2. atomic number of Potassium


3. Write the distribution of electrons in an atom of Potassium.

 4

Match the following: