Question

what happens when we go left to right
in a periodic Table

Electoren gain enthalpy​

Answer 1

Electron gain enthalpy :

• The energy released when an extra electron is added to a neutral gaseous atom is called electron gain enthalpy.
• In general, electron gain enthalpy becomes more negative (more exothermic) from left to right in a period and less negative from top to bottom in a group$.$

∴ Electron gain enthalpy increases (becomes more negative) when we go left to right in periodic table.

Knowledge BoosteR :

⟩ The recurrence of similar properties of the elements after certain definite intervals when the elements are arranged in order of increasing atomic numbers in the periodic table is called periodicity.

⟩ The cause of periodicity is the repetition of similar electronic configurations of the atom in the valence shell after certain definite intervals. These definite intervals are 2, 8, 8, 18, 18 and 32.