Atoms Test - 12...

What would be the radius of second orbit of $${He}^{+}$$ ion?

1. According to Bohr's theory, the radius of the $$n^{th}$$ orbit of an atom of atomic number $$ Z$$ is proportional to 

Light from a tungsten filament lamp gives

Check the wrong statement :

The element which was observed in solar spectrum is 

Match the appropriate pairs from Lists I and II:

The spectra used to identify the elements in the mixture is :

Solar spectrum is an example of 

The idea of quantum nature of light has emerged in an attempt to explain :

Consider the following two statements A and B and identify the correct choice in the given answers
A) Line spectra is due to atoms in gaseous state
B) Band spectra is due to molecules