The time required for one-half of the atoms from a sample of a radioactive substance to decay is called its
a. half-life
b. beta decay
c. alpha decay
d. isotope number

The half life, this is how long it takes for half of the atoms to decay

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.

Answer charle's law