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प्रश्न
Name the following:
An element having valency 'zero'
उत्तर १
Helium
उत्तर २
Element He, Ne, Ar i.e. Noble gases have ‘zero’ valency.
संबंधित प्रश्न
Give electron dot diagram of the following:
methane
Explain the following briefly:
Helium does not form He2 molecule
Name an element which does not contain neutron.
Match the atomic numbers 4, 14, 8, 15 and 19 with each of the following:
- A solid non-metal of valency 3.
- A gas of valency 2.
- A metal of valency 1.
- A non-metal of valency 4.
Give reason
`""_17^35"CI"` and `""_17^37"CI"` do not differ in their chemical reactions.
Element M forms a chloride with the formula MCl2 which is solid with a high melting point. What type of bond is in MCl2. Write the formula of the compound when M combines with sulphur, oxygen, and nitrogen.
Draw the geometric atomic structure of the three isotopes of hydrogen and the two isotopes of chlorine.
Explain Octet rule with an example.
Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
