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प्रश्न
State the type of element for the following:
Xenon
पर्याय
Metal
Non-metal
Metalloid
Noble gas
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उत्तर
Noble gas
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate
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 :
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be :
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
State which element exists in the highest percentage in human body.
Write the chemical formula of the following:
zinc oxide
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
What does the symbol '(s)' present in a chemical equation, mean?
______ of some elements are derived from Latin or Greek names of the elements.
