. Initially, the activity of a sample of phosphorus-32 was 400Bq. After 84 days the activity of a sample of phosphorus-32 has decreased to 25 Bq.
What is the half-life of phosphorus-32?

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

Answerinternal combustion engine fuel;

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day