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प्रश्न
Write the radical of the following valency:
Nitrate
विकल्प
1+
2+
3+
1−
2−
3−
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उत्तर
1−
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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 |
Match the formulas of the following gases with their correct names :
Gases - (a) H2 (b) N2 (c) O2 (d) Cl2 (e) HCI (f) NH3 (g) CO (h) CO2 (i) SO2 (j) NO (k) NO2.
Names:
(1) Ammonia (2) Nitrogen Dioxide (3) Oxygen (4) Hydrogen (5) Nitrogen (6) Chlorine (7) Carbon Monoxide (8) Sulphur Dioxide (9) Nitrogen Monoxide (10) Carbon Dioxide (11) Hydrogen Chloride
Give the symbol of the following element:
Copper
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Give the symbol of the following element:
Phosphorus
State why the molecular formula of zinc carbonate is ZnCO3 .
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______ of some elements are derived from Latin or Greek names of the elements.
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
What is the rarest natural element on the earth?
