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प्रश्न
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
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उत्तर
- Cobalt – Co
- Carbon – c
- Aluminium – A1
- Helium – He (correct)
- Sodium – Na
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संबंधित प्रश्न
Define: Compounds
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
For writing a chemical formula – ‘symbols’ and combining capacity of an element with hydrogen i.e. ‘valency’ should be known. Explain the term – combining the capacity of an element i.e. valency.
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
Give the symbol of the following element:
Antimony
State the type of element for the following:
Mercury
State the type of element for the following:
Neon
State the type of element for the following:
Lead
Write the radical of the following valency:
Oxygen
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).
Hydroxide
