Which one of the elements has the highest ionization energy?
1. [Ne]3s23p1
2. [Ne]3s23p2
3. [Ne]3s23p3
4. [Ar]3d104s24p2
Element/Ion that has the highest electron affinity is :
1. | F- | 2. | O- |
3. | O | 4. | Na |
The correct order of second ionisation energies of B, C, N, & O is
1. O > N > C > B
2. O > C > N > B
3. O > B > C > N
4. O > N >B > C
An atom of the element A has 3 electrons in its outermost shell while another atom X has 6 electrons in its outermost shell. The formula of the compound between A and X could be.
1. A2X3
2. AX3
3. A3X2
4. A2X
Match list-I with list II and select the correct answer using codes given below:
1. List-I Ions List-II Radius (in pm)
(I) Li+ (a) 216
(II) Na+ (b) 195
(III) Br- (c) 60
(IV) I- (d) 95
Codes:
I II III IV
1. a b d c
2. b c a d
3. c d b a
4. d c b a
The screening effect of d-electrons is :
1. Equal of the p-electrons
2. Much more than p-electrons
3. Same as f-electron
4. Less than p-electrons
Values of electronegativity like 3.0, 2.8, 2.5 are related to :-
(1) Elements having low IP in the periodic table
(2) Elements having high EA in the periodic table
(3) Chalcogens
(4) None of the above
Allred Rochow's scale is related to:
1. Electronegativity, radius, and Z*
2. Resonance energy of the molecule, ionisation potential and electron affinity.
3. Bond Polarity, diagonal relationship and periodicity.
4. None of the above.
In scandium series, maximum distance between neutrons containing site and valence shell is of :-
1. Sc
2. Mn
3. Fe
4. Zn
Which of the following ionisation energy order is NOT correct :-
(1) Cu+ > Cu+2
(2) Mn+2 > Mn+3
(3) <
(4) All of the above