Match the following: S.No Column 1 Column 2 Correct Match 1. Sodium Non-metals 2. Aluminium Metals 3. Phosphorus Metalloid 4. Silicon 5. Magnesium

1. Sodium is a highly reactive alkali metal with atomic number 11 . 2. Aluminium is a metal with atomic number 13 . It is a silvery-white metal found in boron group. 3. Phosphorous is a non-metal. It exists as a solid at room temperature. 4. Silicon is a metalloid. It shows the properties of both metals and non-metals. It is a semiconductor. 5. Magnesium is a metal with atomic number 12 . It belongs to group 2 and has a valency of two. That is, S.No Column 1 Correct Match 1. Sodium Metal 2. Aluminium Metal 3. Phosphorus Non-metal 4. Silicon Metalloid 5. Magnesium Metal

State modern periodic law.

The modern periodic law states that, the physical and chemical properties of the elements are the periodic function of their atomic numbers. That is, various elements with similar properties repeat after certain regular intervals or in other words it can be said as, the elements having similar electronic configuration show similar properties.