What happens to the electropositive character of elements on moving from left to right in a periodic table?

Decreases

The correct answer is option 2. Decreases.

As you move from left to right across a period in the periodic table, the electropositive character of elements generally decreases. Electropositive character refers to the tendency of an atom to lose electrons and form positively charged ions (cations).

This trend occurs because, as you move across a period from left to right, the effective nuclear charge increases. The effective nuclear charge is the net positive charge experienced by valence electrons, taking into account shielding effects from inner electrons. With an increasing effective nuclear charge, valence electrons are held more tightly by the nucleus, making it more difficult for the atom to lose electrons and exhibit electropositive behavior.