science

name each ion
1. As3-
2. Ca2+
3. H-

Since this is not my area of expertise, I searched Google under the key words "H- ion", As3- ion" (Sure you don't mean "+"?) and Ca2+ ion" to get these possible sources:

http://www.h-minus-ion.org/
http://environmentalchemistry.com/yogi/chemicals/sl/Arsenic(3%B1)%A0ion%7CAscorbinsaeure.html

Unfortunately, I couldn't find the name for Ca2+. However, in the future, you might find the information you desire more quickly, if you use appropriate key words to do your own search. I hope this helps. Thanks for asking.

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