Advertisements
Advertisements
प्रश्न
The metallic character of the element decreases moving across a period from left to the right.
विकल्प
Right
Wrong
Advertisements
उत्तर
The metallic character of the element decreases moving across a period from left to the right- Right
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?
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
- Is it a metal or a non-metal?
- Is it more or less reactive than calcium?
- What is its valency?
- What will be the formula of its phosphate?
- is it larger or smaller than caesium (Cs) in size?
An element X belong to 3rd periods and group II of the periodic table state:
whether it is a metal or a non-metal.
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| H | He | ||||||
| A | B | ||||||
| C | D |
Will the most non-metallic element be found at A,B,C or D ?
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
If an element is in group 7 is it likely to be metallic or non metallic in character?
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The element at the bottom of a group would be expected to show ______ metallic character than the element at the top.
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.
The tendency of an element to form cation is the ______ character of that element.
Which of the following sets of atomic numbers belong to that of alkali metals?
Choose the odd one out and write the reason:
Metals are good ______ (oxidising agents/reducing agents) because they are electron ______ (acceptors/donors).
