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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
Is is metal or non-metal?
Give the trend in metallic character:
(i) across the period left to right
Give the trend in metallic character:
down the group top to bottom.
An element X belong to 3rd periods and group II of the periodic table state:
whether it is a metal or a non-metal.
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.
In the third period, which is the most metallic and most non-metallic element?
Explain
Larger the atomic size, more metallic is the element.
Select the correct answer
Which of the following electronic structure is of a metal?
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
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 ______.
Write the name.
Two elements having two orbits.
Right or wrong sentence.
Silicon is a metallic element.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Which of the following set of elements is written in order of their increasing metallic character?
Which of the following sets of atomic numbers belong to that of alkali metals?
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
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.
