Author Question: How many valence electrons does group 1 atoms have in periodic table? (Read 879 times)

folubunmi · **on:** Sep 20, 2013

How many valence electrons does group 1 atoms have in periodic table? how do you know this? and how about group 2?

notis · **Reply #1 on:** Sep 20, 2013

1 and 2

mpobi80 · **Reply #2 on:** Sep 20, 2013

group one has 1 valence electron and group two has two valence electrons. You can tell by e/ of the atomic structures of the elements but to make it simpler, just remeber that group one starts with one and then goes to two. and then the halogens and noble gases equal a negative number of valence electrons. good luck, hope this helps

penza · **Reply #3 on:** Sep 20, 2013

All of the elements in group 1 (Alkali Metals) have 1 valence electron
and all of the elements in group 2 (Alkaline Earth Metals) have 2 valence electrons.