What is the charge of the common ion formed by each of these items

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

If oil spills continue, all of the following should be expected except (2 points) death of aquatic life. polluted groundwater. decreased soil productivity. increased global temperatures.