Square Roots of Negative Numbers & Graphing of Same

1. At present I am working with Imag. and Complex Numbers. I want to determine the square roots of the first 100 negaive numbers. So far have done first 20. Would someone "in the know" please check and make sure I have them done correctly --

Sq. Rt. Of Equals

-1 i

-2 i x sq.rt. of 2

-3 i x sq.rt. of 3

-4 2i and -2i

-5 i x sq.rt. of 5

-6 i x sq.rt. of 6

-7 i x sq.rt. of 7

-8 2i x sq.rt. of 2

-9 3i and -3i

-10 i x sq.rt. of 10

-11 i x sq.rt. of 11

-12 2i x sq.rt. of 3

-13 i x sq.rt. of 13

-14 i x sq.rt. of 14

-15 i x sq.rt. of 15

-16 4i or -4i

-17 i x sq. rt. 17

-18 3i x sq.rt. of 2

-19 i x sq.rt. of 19

-20 2i x sq.rt. of 5

2. When I am finished with all 100 negative numbers I want to somehow graph them. Can someone give me the method to use? Complex plane? Polar coordinates? Something else?