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प्रश्न
Write the radical of the following valency:
Oxygen
पर्याय
1+
2+
3+
1−
2−
3−
MCQ
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उत्तर
2−
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संबंधित प्रश्न
The atoms of which of the following pair of elements are most likely to exist in free state ?
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
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 |
Write the radical of the following valency:
Chlorine [Chloride]
Write the radical of the following valency:
Iodine
State the valency of the following metallic element and write symbol with the valency
Magnesium
Name three metals whose symbols are derived: from their Latin names.
Give the qualitative and quantitative meaning of the term ‘symbol’.
What does a chemical symbol represent?
Which letter is never used in any element symbol?
