Answer:
The more spread out their energy becomes
 
        
             
        
        
        
Answer:
See explaination and attachment 
Explanation:
please kindly see attachment for the step by step solution of the given problem. 
 
        
             
        
        
        
61.24 is the molar mass of a gas which has a density of 0.00249 g/mL at 20.0 degrees celcius and 744.0 mm Hg.
Explanation:
given that:
density = 0.00249 g/ml ( )  or 2.49 grams/litre
)  or 2.49 grams/litre
P = 744 mm Hg OR 0.978 atm
T = 20 Degrees or 293.15 Kelvin
R = 0.08206 Litre atm/mole K
molar mass =?
Formula used/
PV = nRT    equation 1
here n is number of moles:
n = 
putting the value of n and value of density in the equation 1:
PV =  x RT
 x RT
molar mass =  x
 x 
                     = density x 
                      = 
                      = 61.24 is the molar mass of the gas.
 
        
             
        
        
        
we have to know the spin of valence electrons of carbon-14
There are four unpaired electron which are called as valence electron also.The spin of the four unpaired electron is either upfilled or down filled.
The ground state electronic configuration of C-atom is 1s²2s²2p² and one electron from 2s orbital gets excited to 2p orbital. The elctronic configuration in excited state is 1s²2s¹ .
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The electron jumps because half-filled orbitals are more stable. Exchange energy is less than pairing energy.