Answer: the answer is D heat and pressure
Explanation: I just took the test.
Electrons and protons because they are essentially always the same
Answer:
The half-life of a radioisotope describes the amount of time it takes for said isotope to decay to one-half the original amount present in the sample.
Nitrogen-13, because it has a half-life of ten minutes, will experience two half-lives over the course of the twenty minute period. This means that 25% of the isotope will remain after this.
0.25 x 128mg = 32mg
32mg of Nitrogen-13 will remain after 20 minutes.
Covalent bonds would be formed when a non-metal bonds with another non-metal
