The magnitude of effective nuclear charge of alkaline earth metals is in the order
Be < Mg = Ca = Sr = Ba
Be < Mg < Ca < Sr< Ba
Be > Mg = Ca = Sr = Ba
Be > Mg > Ca > Sr> Ba
The Size of I, I+ and I- follow the order
I+> I-> I
I-> I+ >I
I-> I>I+
I+>I>I-
The correctly matched combination is
C-cl bond length→0.176nm.
Ionic radius of F- →0.095nm.
C-C bond length → 0.077nm.
Ionic radius of Na+→0.0136 nm .
The outermost electronic configuration of the most electro negative element is
ns2np5
ns2np4
ns2np3
ns2np2
The effective nuclear charge of an atom depends upon
Atomic number and nuclear charge
Shielding effect
Atomic number and shielding effect
Shielding effect and nuclear charge
The element that does not show positive oxidation state in its compounds is
Xe
Cl
O
F
The amount of energy required to convert 3 moles of sodium atoms in the gaseous state to form sodium ions, if the ionisation enthalpy of Na is 5.1 ev/atom is
1476J
147.6J
1476KJ
147.6KJ
The relation between IE3 and IE1 of the element is
IE3>IE1
IE31
IE3=IE1
None of the above
Maximum number of unpaired electrons are present in
Co
Ni
Cr
Fe
Of the following pairs, the one containing a metalloid element is
F&Cl
Ca &Mg
As & Sb
Na & K
