Today students played teacher and taught each other about ionic and covalent bonds. We also learned more about why certain elements bond better with each other= valence electrons! The valence electrons of atoms that bond should add up to 8. Here is a chart showing how elements in the same column have the same number of valence electrons, or electrons on the very edge of the atom that are involved in chemical bonds:
For Example: Lithium (1 valence e-) bonds with Fluorine (7 valence e-) because they add up to 8 to make the bond noble.
Homework: None