When arranged in order of increasing atomic number, the elements exhibit periodicity for all the following properties except O electron affinity.
O jonization energy.
O atomic radius.
O color.
O electron configuration.

you need to give more information

well in order to answer this question you have to provide more information < 3

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

a electronegativity decreases beacuse the size of nucleus is bigger.