Question

Sulphur has more negative electron gain enthalpy than oxygen.

Answer 1

Hint :Periodic table contains chemical elements arranged in the increasing order of atomic numbers. The Sulphur and oxygen belong to the same group. The group number is $ 16 $ . Oxygen is more electronegative and has more density compared to sulphur. Thus, sulphur has more negative electron gain enthalpy.

Complete Step By Step Answer:
Periodic table is the representation of chemical elements arranged according to periodic properties. In the modern periodic table the elements are arranged in the order of atomic numbers. The elements are arranged in vertical columns and horizontal rows. The vertical columns are called groups and the horizontal rows are called periods.
The elements belonging to group $ 16 $ are called oxygen families or chalcogens. Oxygen is more electronegative than sulphur. Oxygen has less number of electrons so, it has more effect on outermost electrons and is difficult to add an electron to oxygen.
The electron gain enthalpy can be defined as the amount of energy released when an electron is added to an atom to become an ion. It is difficult to make oxygen to an ion.
Negative electron gain enthalpy is the energy released having negative values. The oxygen has higher electron gain enthalpy values and the Sulphur has negative values.
Thus, the statement is true as Sulphur has more negative electron gain enthalpy than oxygen.

Note :
The ion can be formed by the addition or losing of electrons. The positive ion can be formed by the losing of electrons and the negative ion can be formed by the gaining of electrons. Oxygen and Sulphur are mostly non-metallic and can gain electrons.