How do the radius of atoms, their electronegativity, and the non-metallic properties of their simple substances change

How do the radius of atoms, their electronegativity, and the non-metallic properties of their simple substances change from top to bottom in a group? How do these properties change when going from oxygen to sulfur?

In the group from top to bottom, the radius of the atom increases, the electronegativity decreases, and the non-metallic properties decrease. It is also typical when going from oxygen to sulfur.

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