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प्रश्न
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.
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उत्तर
a) The block shown by box A is s-Block.
S(16) = 2, 8, 6 (electronic configuration of any element in s block)
b) The block of element denoted by letter B is d – Block.
The period number of that element is 4.
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संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
Name any five periods properties.
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
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.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-metal
Select the correct answer
Which of the following electronic structure is of a metal?
Select the correct answer
Configuration of an element is 2, 8, 1. Which of the following statement is true?
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last). Answer the following question in relation to the given group of elements:
Which element has the most 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 anion is the ______ character of that element.
The metallic character of the element decreases moving across a period from left to the right.
On moving down the group metallic character increases.
Write an Explanation.
Electropositivity
Write an Explanation.
Electronegativity
3, 1, 2 electrons are in valence shells of X, Y, Z elements. From this information, state the group in which they belong and write their valencies.
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
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.
