How to find the valency of an element. 100 points and brainleiest for first answer. plus . also how to ace chemistry exams that are tomorrow.

vertical colums tell the valence and the horozontal rows tell the amount of rings that the electrons circle in.

It is easy to find this by simply looking at the Group # (these are the column numbers).

Elements in Group 1 all have 1 electron in their valence shell, Elements in group 2 have 2 and so on...

If you mean how many shells there are then look at the Period # this is the horizontal groups) the Period # corresponds with the number of electron shells.

Elements in Period 2 have 2 electron shells, elements in Period 3 have 3 and so on...

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.