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प्रश्न
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.
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उत्तर
| Valence shell electron(s) |
Group | Valency |
| 3 | 13 | 3 |
| 1 | 1 | 1 |
| 2 | 2 | 2 |
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संबंधित प्रश्न
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.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
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whether it is a metal or a non-metal.
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Is it a metal or a non-metal?
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
In Period 3, the most metallic element is ______.
Match the atomic number with the following:
A metal of valency one.
Write the name.
The atom having the smallest atomic radius from zero group.
Write the name.
Two elements having two orbits.
Silicon is a metallic element.
On moving down the group metallic character increases.
Write scientific reason.
The metallic character of elements increases while going down the groups.
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
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- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
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Be, Li, C, B, N, O, F (in 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.
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Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
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