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प्रश्न
Write the symbols of helium, silver, krypton, antimony, barium.
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उत्तर
| Element | Symbol |
| Helium | He |
| Silver | Ag |
| Krypton | Kr |
| Antimony | Sb |
| Barium | Ba |
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संबंधित प्रश्न
Define: Elements-
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be :
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
State which element exists in the highest percentage in atmosphere.
Give the symbol of the following element:
Zinc
Give the symbol of the following element:
Radon
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
State the valency of the following metallic element and write symbol with the valency
Zinc
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
Define Alchemy.
