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प्रश्न
Write scientific reason.
The metallic character of elements increases while going down the groups.
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उत्तर
- While going down a group a new shell gets added, resulting in an increase in the distance between the nucleus and the valence electrons.
- This results in lowering the effective nuclear charge and thereby lowering the attractive force on the valence electrons.
- As a result of this, the tendency of the atom to form cation by losing electrons increases.
- The metallic character of an atom is its tendency to lose electrons.
Hence, the metallic character of elements increases while going down the groups.
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संबंधित प्रश्न
Choose the word or phrase from the brackets which correctly complete the following statement:
Metals are good ______ (oxidizing agents/reducing agents) because they are electron ______ (acceptors/donors).
Arrange the following as per the instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing order of metallic character).
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.
Name any five periods properties.
Metallic character and non-metallic character are periodic properties discuss ?
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
Which has the maximum metallic character Na, Li or K?
iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
In the third period, which is the most metallic and most non-metallic element?
If an element is in group 7 is it likely to be metallic or non metallic in 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.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
The tendency of an element to form anion is the ______ character of that element.
Electronegativity is the metallic property of an element.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Three elements B, Si and Ge are
Choose the odd one out and write the reason:
Metals are good ______ because they are electron ______.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
