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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
Name the elements represented by the following symbols :
Hg, Pb, Au, Ag, Sn
A student wants to have 3.011 × 1023 atoms each of magnesium and carbon elements. For this purpose, he will have to weigh :
What do the following symbol stand for?
H
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Give the symbol of the following element:
Radon
Give the symbol of the following element:
Carbonate
State the valency of the following metallic element and write symbol with the valency
Chromium
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).
Permanganate
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
