31 which notations represent different isotopes of the element sodium? (1) 32s and 34s (3) na+ and nao
(2) s2- and s6+ (4) 22na and 23na

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided