Classification ...

Which systematic diagram represent the correct sequence of the physical properties?
No. Property 
1. Electronegativity
2. Metallic property
3. Atomic radius 

Electron affinity of the elements or ions shown correctly?

Which of the following has the highest electron gain affinity?

The total number of elements of the fifth period having one or more $$5d$$ electrons:-

Two moles of $$N _ { 2 }$$ and two moles of $$\mathrm { H } _ { 2 }$$ are taken in a closed vessel of 5 litres capacity and suitable conditions are provided for the reaction. When the equilibrium is reached, it is found that a half mole of $$N _ { 2 }$$is used up. The equilibrium concentration of $$N H _ { 3 }$$ is:

When the first electron gain enthalpy $$(\Delta _{eg}H)$$ of oxygen is -141 kJ/mol, its second electron gain enthalpy is: 

If X(OH) > Y(OH) (acidic strength) 
'X' and 'Y' both belong to same group then select the CORRECT statement :-

The IUPAC name of the element having atomic number 109 is

The electronic configuration of an element is $$1{ s }^{ 2 }2{ s }^{ 2 }2{ p }^{ 6 }3{ s }^{ 2 }3{ p }^{ 6 }3{ d }^{ 5 }4{ s }^{ 1 }.$$ This represents its:

Which of the following factor is the most important in making fluorine the strongest oxidizing agent?