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1.
A heavy element has atomic number 
and mass number 
. Correct relationship between 
and is
and mass number . Correct relationship between and is
2.
Proton is :
3.
An isotone of 
is
is
4.
Which principle/rule limits the maximum number of electrons in an orbital to two?
5.
Magnitude of kinetic energy in an orbit is equal to
6.
The shortest 
for the Lyman series is: (Given 
)
for the Lyman series is: (Given )
7.
The maximum number of atomic orbitals associated with a principal quantum number 5 is:
8.
The number of orbitals present in the shell with 
is
is
9.
Which one of the following is the set of correct quantum numbers of an electron in 
orbital?
orbital?
10.
Different lines in Lyman series of hydrogen spectrum lie in .... region