Look at the table and tell:

Second period	$\mathrm{Li}$	$\mathrm{Be}$	$\mathrm{B}$	$\mathrm{C}$	$\mathrm{N}$	$\mathrm{O}$	$\mathrm{F}$
Atomic number	$3$	$4$	$5$	$6$	$7$	$8$	$9$

How do the metallic and non-metallic properties change as we move from left to right?