Question

Properties of the elements are given below. Where would you locate the following elements in the periodic table?

1. A soft metal stored under kerosene
2. An element with variable (more than one) valency stored under water.
3. An element which is tetravalent and forms the basis of organic chemistry
4. An element which is an inert gas with atomic number 2
5. An element whose thin oxide layer is used to make other elements corrosion resistant by the process of “ anodising”

Answer 1

1. A soft metal stored under kerosene is sodium. Sodium is located at 1st group and 3rd period in the periodic table.
2. An element with variable (more than one) valency stored underwater is phosphorus, it is located at 15th group and 3rd period in the periodic table.
3. An element which is tetravalent and forms the basis of organic chemistry is carbon, it is located at 14th group and 2nd period in the periodic table.
4. An element which is an inert gas with atomic number 2 is helium, it is located at 18th group and 1st period in the periodic table.
5. An element whose thin oxide layer is used to make other elements corrosion-resistant by the process of “ anodising” is aluminium, it is located at 13th group and 3rd period in the periodic table.