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प्रश्न
State whether the following statement is true or false:
The symbol of element cobalt is CO.
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उत्तर
False. The symbol for the element Cobalt is Co, as the second letter of the symbol of an element has to be in the lower case.
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संबंधित प्रश्न
Give two symbols which have been derived from the " Latin names" of the elements.
Out of ozone, phosphorus, sulphur and krypton, the elements having the lowest and highest atomicities are respectively :
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
State which element exists in the highest percentage in human body.
State the type of element for the following:
Carbon
Write the radical of the following valency:
Sulphur [Sulphide]
Write the radical of the following valency:
Iodine
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).
Bisulphite
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).
Aluminate
Antimony has the highest tensile strength.
