228 90th then decays by emitting alpha particles until 212 82pb is formed. how many alpha decays will occur during this chain process?

2positives of biotechnology: 1. plants have become more resistant to viruses and other communicable pests.2. with the of biotechnology, we have been able to produce better tasting fruits as well as vegetables.2 negatives of biotechnology: 1. biotechnology poses a number of environmental threats. genetically modifies crops often infect monarch butterflies and other insect species.2. viruses could combine with crops.

Answers are 1,2,4 its correct on edgenuity.