Q5 of 17 Page 24

Symbols (not real symbols) of some atoms are given.


Which among these are isotopic pairs?

Isotopes are the chemical species which have the same atomic number but different mass numbers.

In the given atoms, atom P and R have the same atomic number but different mass numbers.


Hence atoms P and R makes an isotopic pair.


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4

Bohr models of atoms A, B, C, D are given (Symbols are not real).

a) Write the atomic number, mass number and electronic configuration of the atoms,


b) Among these, which are isotxopes? Why?



 5

Symbols (not real symbols) of some atoms are given.


Find the atomic number and mass number of these elements.

5

Symbols (not real symbols) of some atoms are given.


Draw the Bohr model of atom Q.

 1

Prepare a science magazine including photos, profiles and contributions of philosophers and scientists related to the history of atoms.