2 stands for valency of ca ion
its +2
that it takes two electrons to complete its shell
THE ANSWER IS I.ASTEROIDS II.COMETS III. METEOROIDS IV. PLANETS PLZ MARK BRAINLISEST HOPE I HELPED THX
Answer:
303.4 millimeters
Explanation:
Just multiply 1.64 by 0.185. then convert that answer to millimeters
I think the answer is A but i'm not sure