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प्रश्न
What is variable valency? Name two elements having variable valency and state their valencies.
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उत्तर
Variable valency: Some elements exhibit more than one valency. They are said to have variable valency, e.g. Iron, copper, tin, lead.
Iron Fe Fe2+ or Fe3+
Copper cu cu+ or cu2+
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संबंधित प्रश्न
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
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B electronic configuration 2,8,8
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State Valency of each element
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B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
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