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प्रश्न
What does the symbol '⇌' present in a chemical equation, mean?
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उत्तर
'⇌' stands for a reversible reaction.
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संबंधित प्रश्न
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Select the correct answer from the choice given below.
The symbol of mercury is
Give the symbol of the following element:
Phosphorus
State the type of element for the following:
Mercury
State the type of element for the following:
Radon
State the type of element for the following:
Aluminium
Give the formula of the following acid:
Hydrochloric
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency
In the same way in chemistry, each element is denoted by a ______.
What is the significance of the symbol of an element?
