1. The modern periodic table was given by Henry Mosely. The modern periodic law states that periodicity of elements is a function of their atomic numbers.
2. The basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements consists of groups and periods, where the number of valence electrons determines the group and number of shells determines the period.
The given element’s electronic configuration is 2, 8, 4.This means that there are 14 electrons in this element. So,
a) So, the element belongs to the 3rd period and 4th group.
b) The element, therefore, is Silicon. Properties: Silicon is a metalloid and has a melting point if 1410oC. It is a poor conductor of electricity.
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