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प्रश्न
State the type of element for the following:
Zinc
पर्याय
Metal
Non-metal
Metalloid
Noble gas
उत्तर
Metal
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संबंधित प्रश्न
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
Explain the terms ‘chemical formula’.
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
Give the symbol of the following element:
Arsenic
Give the formula of the following gas:
Nitrous oxide
Give the formula of the following gas:
Nitrogen dioxide
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).
Bromide
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
State why the molecular formula of zinc carbonate is ZnCO3 .
How many elements are known at present?
