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प्रश्न
Name the following:
An element having valency 'zero'
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उत्तर १
Helium
उत्तर २
Element He, Ne, Ar i.e. Noble gases have ‘zero’ valency.
संबंधित प्रश्न
Define a chemical bond.
State differences between the properties of ionic compounds and covalent compounds.
State the following is a reduction reaction or oxidation reaction.
\[\ce{A^3+ + e- -> A^2+}\]
How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
Draw orbit structure diagram of calcium oxide (CaO).
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidation.
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
How do atoms attain Noble gas electronic configuration?
Complete the following table:
| a. | Dativebond | ______ |
| b. | CaH2 → Ca+H2 | ______ |
| c. | ______ | Reduction |
| d. | ______ | Redox reaction |
