They all have 2 electrons in their outer shells.
valence electrons and electronic configuration.
Only group 18 elements have noble gas configuration. All other elements lack a noble gas electronic configuration.
The general electronic configuration of nitrogen group elements is ns2np3, where "n" represents the valence shell. Each element in this group has 5 valence electrons, with 2 in the s orbital and 3 in the p orbital. This configuration gives these elements similar chemical properties, such as the tendency to form covalent bonds.
because they have completely filled electronic configuration.
group 18 has completely filled electronic configuration and hence are stable. group 1 and group 2 have 1 and 2 electrons respectively in their valence shells and needs to lose these to attain completely filled electronic configuration. hence they are reactive.
The electronic configuration of an atom is related to its position in the periodic table because elements in the same group have similar electronic configurations due to having the same number of valence electrons. Elements in the same period have varying electron configurations as atomic number increases across the period. This organization helps predict elements' chemical properties and behaviors.
Periodic Table was constructed by using electronic configuration . Elements have same outer shell electronic configuration were in same group . So they have similar chemical properties . If an unknown element will register in future , its properties are predicted with the help of its outer shell configuration.
Valance level
Elements in the same vertical column or group have similar valence shell electronic configurations,the same number of electrons in the outer orbitals, and similar properties.
Elements are placed in the periodic table based on their electronic configuration, which refers to the arrangement of electrons in the atom's energy levels or orbitals. Elements with similar electronic configurations are placed in the same column or group of the periodic table. The periodic table organizes elements in order of increasing atomic number and arranges them into rows and columns based on their electronic structure.
The elements in group 3A and 6A show a dip in ionization energy due to the presence of a full or half-full subshell. In group 3A, elements have a stable electronic configuration when one electron is removed, resulting in a lower ionization energy. In group 6A, elements exhibit a half-filled p orbital when one electron is added, making it easier to remove an electron and thus lowering the ionization energy.
Helium has the highest ionization energy (IE) among all the elements, as it has a fully stable electron configuration that resists losing an electron. Other elements with high ionization energies include neon, followed by elements in the noble gas group due to their stable electronic configuration.