Answer:-1
Step-by-step explanation:
An electron has a negative charge, a proton has a positive charge, and a neutron has a neutral charge. Neutrons do not have an effect on charge. We can see that there is one more electron than proton, with there being 36 electrons, and 35 protons. We simply find the difference between the protons and electrons, and depending on which atom has more, depends on the charge. In this case, 36-35=1, and the 1 is 1 extra electron, making the charge -1 for this ion.