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प्रश्न
Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :
विकल्प
copper and sulphur
sulphur and iron
phosphorus and nitrogen
nitrogen and iron
उत्तर
nitrogen and iron
Elements X and Y, most likely, are nitrogen and iron.
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
Name the element used as a standard for atomic mass scale.
Give the symbol of the following element:
Boron
Give the symbol of the following element:
Phosphorus
State the type of element for the following:
Iodine
Write the radical of the following valency:
magnesium
Write the radical of the following valency:
Bromine [Bromide]
Write the radical of the following valency:
Sulphur [Sulphide]
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Sulphite
The symbol of tungsten is _______.
