Isotope Worksheet

Part 1 *Use your periodic table to help fill in the missing information.*You may assume that all atoms are neutral.*Be sure to properly record all element symbols. The first letter is ALWAYS capitalized. Any remaining letters are ALWAYS lower case. 11 12 11 11 23 90 38 Sr-90 I-131 78 53 53 131 53 1 1 H-2 S-36 20 16 16 36 16 He-4 2 2 26 12 12 12 14 K-40 19 19 21 8 8 8 Part 2 Use your periodic table to help determine the number of protons, neutrons, and electrons in each of the following isotopes. (You may assume that all atoms are neutral.) 16 16 16 11 12 11 4 5 4 19 20 19 7 7 7 18 22 18