Chemistry
An element has 3 electrons in its M shell. It belongs to:
- Period 13, group 3
- Period III, group 3
- Period III, group III B
- Period III, group 13
Related Questions
The element whose atomic weight was corrected on the basis of its position in Mendeleev's periodic table is :
- Hydrogen
- Gold
- Silver
- Copper
Excessive release of carbon dioxide in the atmosphere is the cause of :
- depletion of ozone
- formation of polar vortex
- global warming
- formation of smog
Noble gases are monoatomic gases because:
- Their electronic configuration is stable
- They are non-supporters of combustion
- They are liquefied with great difficulty
- They do not react
Rivers and lakes do not freeze easily because:
- Water does not contain matter like air, carbon dioxide and other minerals.
- Water is a universal solvent.
- Water has a high specific heat capacity and ice has a high latent heat of fusion.
- River water is fresh water.