Question 1 / 4What is the charge on the oxide ion? A. +1 B. +2 C. -2 D. -1

option c is correct

Explanation:

the atomic number of oxygen is 8  when oxygen atom gains two electron then it is converted into oxide ion and the charge on oxide ion becomes -2 because of two extra electron

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.