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प्रश्न
The given table shows elements with the same number of electrons in its valence shell.
| Elements | A | B | C |
| m.p. | 63.0 | 180.0 | 97.0 |
Arrange them in order of increasing metallic character.
उत्तर
B < C < A
The metallic character increases as m.p. 180.0 > 97.0 > 63.0 decreases.
संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Is is metal or non-metal?
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
List:
| Calcium | Oxygen | Copper (II) Oxide |
| Carbon | Calcium hydroxide | Copper (II) Nitrate |
| Lead (II) Oxide | Hydrogen chloride | Chlorine |
| Lead (II) Nitrate | Calcium Oxide | Ammonium chloride |
- P is white solid. When heated produces white fumes (sublime).
- P and R on warming produce an alkaline gas.
- On adding water to T, heat is evolved and R is formed.
- Q burns brightly in the air to form T.
- When S is heated, it gives off brown fumes and leaves a black residue of U.
- A solution of S is formed by warming U with dilute nitric acid.
- V is a gaseous non-metallic element that reacts with hydrogen to form W.
- A solution of W will neutralize the solution of R.
Write the name.
The atom having the smallest atomic radius from zero group.
Write an Explanation.
Electronegativity
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
