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प्रश्न
How are the elements with variable valency named? Explain with an example.
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उत्तर
If an element exhibits two different positive valencies, then
- for the lower valency, use the suffix -OUS at the end of the name of the metal
- for the higher valency, use the suffix -IC at the end of the name of the metal.
Example:
|
Element |
Lower valency |
Higher valency |
|
Ferrum (Iron) |
Ferrous (Fe2+) |
Ferric (Fe3+) |
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संबंधित प्रश्न
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Give the symbol of the following element:
Potassium
Give the symbol of the following element:
Mercury
Give the symbol of the following element:
Sodium
State the type of element for the following:
Radon
Write the radical of the following valency:
Chlorine [Chloride]
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
Give a reason – Magnesium [2, 8, 2] has valency 2+.
Name the elements with the following symbols.
- Na
- W
- Ba
- Al
- U
