31 Figure 1 Base your answer to the question on the information below and on your knowledge of chemistry. lodine has many isotopes, but only iodine-127 is stable and is found in nature. One radioactive iodine isotope, I-108, decays by alpha particle emission. Iodine-131 is also radioactive and has many important medical uses. Refer to Figure 1 and answer the following Question: Determine the number of neutrons in an atom of 1-127. Answer: 32 Figure 2 Base your answer to this question on the information below. The nucleus of one boron atom has five protons and four neutrons. Refer to Figure 2 and answer the following Question: Determine the total charge of the boron nucleus, Answer: 33 The diagram represents an atom of magnesium-26 in the ground state. Mg-26 nucleus An atom of Mg-26 in the ground state has valence electrons