I think this is definitely WHO because the story is talking about a certain unknown character.
Answer: 1.) polio , 2.) weaker, 3.) daily, 4.) he joined the Olympics , 5.) three events, 6.) all three events , 7.) gold medals , 8.) they dropped the hope, step, and jump from the events list. 9.) when he went to Asia, 10.) millions of years ago I believe, 11.) C , 12.) explains in passage , 13.) B , 14.) A , 15.) C , 16.) looked at the instructions
Explanation:
The charge on an ion is determined by the protons and electrons. Neutrons have nothing to do with it.
Rule 1: If there are more electrons than protons, the charge is minus. Make sure you know what what more than means and what charge electrons have.
Rule 2: if there are more protons than electrons, the charge is plus.
There are 42 protons and 43 electrons. The charge is 1 minus.
