Look at the elements from period 2 on the Periodic Table. Explain the differences in their reactivity and how it relates to the Periodic Table. Periodic Table of the Elements

And a) oxygen i believe

Acidichope this  

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this . 

Hello, i think is ahope it