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प्रश्न
State which element exists in the highest percentage in earth’s crust.
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उत्तर
Oxygen (O) – 46.1%
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संबंधित प्रश्न
What is the significance of the symbol of an element ? Explain with the help of an example.
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
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
Select the correct answer from the choice given below.
The symbol of mercury is
Give the symbol of the following element:
Bromine [bromide]
State the type of element for the following:
Oxygen
State the type of element for the following:
Platinum
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).
Chloride
Name three metals whose symbols are derived from the first letter of the name of the element.
