Advertisements
Advertisements
प्रश्न
Write the name.
The atom having the smallest atomic radius from zero group.
Advertisements
उत्तर
Helium (He)
APPEARS IN
संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element B would have ______ metallic character than A.
Answer the following in respect of element `31/15 P `
What is its valency?
Explain why the following statement is not correct:
All groups contain metals and non metals.
Write a scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
In Period 3, the most metallic element is ______.
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
Select the correct answer
Which of the following electronic structure is of a metal?
Within a group, where would you expect to find the element with the greatest metallic character.
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.
Electropositivity means ______.
On moving down the group metallic character increases.
Write an explanation.
Electropositivity
3, 1, 2 electrons are in valence shells of X, Y, Z elements resp. From this information, write the name of the groups it belongs to and its valency.
Which of the following set of elements is written in order of their increasing metallic character?
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
Choose the odd one out and write the reason:
Metals are good ______ (oxidising agents/reducing agents) because they are electron ______ (acceptors/donors).
