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प्रश्न
The electronic configuration of metal A is 2, 8, 18, 1.
The metal A when exposed to air and moisture forms B a green layered compound. A with con. H2 SO4 forms C and D along with water. D is a gaseous compound. Find A, B, C, and D.
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उत्तर
(i) The electronic configuration of metal (A) is 2, 8, 18, 1. A is copper (Z = 29)
(ii) (A) Copper exposed to air and moisture forms a green layered compound (B) that is copper carbonate.
\[\ce{\underset{\text{(A)}}{2Cu} + O2 + CO2 + H2O-> CuCO3.\underset{\text{(B)}}{Cu(OH)2}}\]
(iii) Copper (A) reacts with conc.H2SO4 to give copper sulphate (C) and Sulphur dioxide (D).
\[\ce{\underset{\text{(A)}}{Cu} + conc.2H2SO4->\underset{\text{(C)}}{CuSO4} + \underset{\text{(D)}}{SO2↑} + 2H2O}\]
| A | Copper | Cu |
| B | Copper carbonate | \[\ce{CuCO3.Cu(OH)2}\] |
| C | Copper sulphate | CuSO4 |
| D | Sulphur dioxide | SO2 |
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संबंधित प्रश्न
Give the trends in atomic size on moving across the period left to right.
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
The size of an atom is indicated by its ______.
Some elements and their atomic radii are given here. Arrange them in decreasing order of their atomic radii. Identify which of the above elements is the biggest atom and which is smallest?
| Element | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
Which of the following is the correct order of atomic size?
When an atom of iodine becomes an iodine ion (I–) the radius will ______
Which one of the following depict the correct representation of atomic radius(r) of an atom?
|
(i) |
(ii) |
|
(iii) |
(iv) |
- Electropositive nature of the element(s) increases down the group and decreases across the period
- Electronegativity of the element decreases down the group and increases across the period
- Atomic size increases down the group and decreases across a period (left to right)
- Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
- Name the most electropositive element among them
- Name the most electronegative element
- Name the element with smallest atomic size
- Name the element which is a metalloid
- Name the element which shows maximum valency.
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
Arrange the following in order of increasing radii:
Mg2+, Mg, Mg+
Explain your choice.
