Fill in the missing information on the table below. Two examples have been filled in for you. Recall that the mass number is equal to the sum of the number of protons and neutrons. The number of protons equals the number of electrons when the charge is 0. To find the charge, subtract the number of electrons from the number of protons. Chemical Symbol Atomic Number Protons Neutrons Electrons Mass Number Charge Ca 20 20 20 18 40 +2 S 16 16 17 18 33 -2 Al 14 0 K 39 0 N 8 0 Br 36 80 Cu 35 27 *Privileged and Confidential: This information, including attachments, is for the exclusive use of the addressee and may contain proprietary, confidential and/or privileged information. If you are not the recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and destroy this communication.