Question

What increases/decreases when we go across a period and down a group?

Answer 1

atomic size,metallic and non metallic character,tendency to lose and gain electrons

Answer 2

electronegativity

Atomic size increases when moving down in agroup thus electronegativity decreases when we move from top to bottom in the periodic table. Metallic character decreases as you move across a period in the periodic table from left to right.