What kind of materials can become electrically charged when they are rubbed together?

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

50 pts plz what is the physical state of matter of baking soda.

Based on the equation and the information in the table, what is the enthalpy of the reaction?