What is the order of decreasing atomic radius?

1. antimony, bismuth, phosphorus

2. bismuth, phosphorus, antimony

3. antimony, phosphorus, bismuth

4. phosphorus, antimony, bismuth

5. bismuth, antimony, phosphorus

6. phohshorus, bismuth, antimony

The order of decreasing atomic radius is bismuth, antimony, phosphorus. Number 5.

Explanation:

The largest elements are the furthest to the left and down on the periodic table. The closer to the top right of the periodic table the smaller the element.

The atomic numbers are:

bismuth = 83 antinomy = 51 phosphorus = 15