1. | Na | 2. | O |
3. | F | 4. | N |
Match List-I with List-II:
List-I Elements |
List-II Atomic radii (pm) |
||
(a) | O | (i) | 88 |
(b) | C | (ii) | 74 |
(c) | B | (iii) | 66 |
(d) | N | (iv) | 77 |
(a) | (b) | (c) | (d) | |
1. | (ii) | (i) | (iv) | (iii) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |
The species Ar, K+ and Ca2+ contain the same number of electrons. In which order do their radii increase?
1. Ar < K+ < Ca2+
2. Ca2+ < Ar < K+
3. Ca2+ < K+ < Ar
4. K+ < Ar < Ca2+
The correct order of ionic radii is:
1.
2.
3.
4.
The correct order of the decreasing ionic radii among the following isoelectronic species is:
1.
2.
3.
4.
Among the elements Ca, Mg, P and Cl, the correct order of increasing atomic radii is:
1. Cl < P < Mg < Ca
2. P < Cl < Ca < Mg
3. Ca < Mg < P < Cl
4. Mg < Ca < Cl < P
Identify the correct order of the size of the following:
1.
2.
3.
4.
Ionic radii are:
1. | Inversely proportional to the square of effective nuclear charge. |
2. | Directly proportional to the effective nuclear charge. |
3. | Directly proportional to the square of effective nuclear charge. |
4. | Inversely proportional to the effective nuclear charge. |
The ions O2–, F–, Na+, Mg2+, and Al3+ are isoelectronic. Their ionic radii show:
1. | A significant increase from O2– to Al3+. |
2. | A significant decrease from O2– to Al3+. |
3. | An increase from O2– to F– and then a decrease from Na+ to Al3+. |
4. | A decrease from O2– to F– and then an increase from Na+ to Al3+. |