The element of atomic number 8 is closest in chemical properties of the elements having atomic number
7
9
18
16
The electonegativity of 'Be' is same as that of
Li
Mg
Al
Na
The energy required to produce 0.5g of hydrogen atom is
262.4KJ/ mole
656.2KJ/mole
13.6 eV
65.62 KJ/ mole
The configuration associated with biggest jump between second and third ionisation energy is
1s22s22p6 3s2
1s22s22p2
1s22s22p63s1
1s22s22p1
The Size of I, I+ and I- follow the order
I+> I-> I
I-> I+ >I
I-> I>I+
I+>I>I-
Out of the following the energy releasing process is
O-(g)+e → O2-
x-→x(g) +e
O(g)+e-→O-(g)
O(g)→O++e
The physical properties of vanadium are more closely related to that of
Titanium
Tungsten
Niobium
Nobelium
The decreasing order of the second ionization potential of K, Ca and Ba is
K > Ca > Ba
Ca > Ba > K
Ba > K> Ca
K > Ba > Ca
Out of the following transitions the one which involves maximum amount of energy.
M2+(g) →M3+(g)
M+(g) →M2+(g)
M(g) →M+(g)
M-(g) →M(g)
The property which is not that of an isolated atom is
Atomic volume
Ionisation energy
Electron gain enthalpy
Atomic size
