Match the element in Column I with that in Column II.
Column-I | Column-II | ||
(a) | Copper | (i) | Non-metal |
(b) | Fluorine | (ii) | Transition metal |
(c) | Silicon | (iii) | Lanthanoid |
(d) | Cerium | (iv) | Metalloid |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iv) | (i) | (iii) |
2. | (ii) | (i) | (iv) | (iii) |
3. | (iv) | (iii) | (i) | (ii) |
4. | (i) | (ii) | (iii) | (iv) |
Be2+ is isoelectronic with which of the following ions?
1.
2.
3.
4.
Amongst the elements with the following electronic configurations, which one of them may have the highest ionisation energy?
1.
2.
3.
4.
Among the following, the most characteristic oxidation states for lead and tin are, respectively:
1. +4, +2
2. +2, +4
3. +4, +4
4. +2, +2
If an atom has electronic configuration 1s22s22p63s23p63d34s2, we will place it in group number:
1. | Fifth | 2. | Fifteenth |
3. | Second | 4. | Third |