Write the atomic number of the element present in the third period and seventeenth group of the periodic table.
In the third period the filling up of only 3s and 3p-orbitals occur. Therefore, in this period there are only two s- and six p-biock elements. Since the third period (n = 3) starts with Z = 11 and ends at Z = 18, hence the element is chlorine (CI) with atomic number (Z) = 17 which is present in the third period and seventeenth group of the periodic table.
An element A with atomic number 112 has recently been discovered. Predict its electronic configuration and suggest the group in which this element be placed.
The bond length of HCl bond is 136 pm. Covalent radius of hydrogen atom is 37 pm. What is the covalent radius of chlorine atom?