Bonding basics name section a: complete the chart using a periodic table to you. element atomic symbol total # of electrons # of valence electrons # of electrons gained or lost oxidation number chlorine potassium magnesium fluorine aluminum sodium nitrogen oxygen hydrogen carbon iodine answer these questions:  an atom that gains one or more electrons will have a charge.  an atom that loses one or more electrons will have a charge.  an atom that gains or loses one or more electrons is called an  a positive ion is called a and a negative ion is called an section b: what is an ionic bond?  atoms will transfer one or more to another to form the bond.  each atom is left with a outer shell.  an ionic bond forms between a ion with a positive charge and a ion with a negative charge. example b1: sodium + chlorine example b2: magnesium + iodine t. trimpe & l. bogner 2008 example b3: potassium + iodine example b4: sodium + oxygen example b5: calcium + chlorine example b6: aluminum + chlorine section c: what is a covalent bond?  atoms one or more electrons with each other to form the bond.  each atom is left with a outer shell.  a covalent bond forms between two example c1: hydrogen + hydrogen example c3: chlorine + chlorine example c5: carbon + 2 oxygen example c2: 2 hydrogen + oxygen example c4: oxygen + oxygen example c6: carbon + 4 hydrogen challenge: what are some other ionic or covalent bonds that can be formed by the elements you see? write the chemical formula for the compound and its name on a separate piece of paper and attach to this page. t. trimpe & l. bogner 2008