Answer:
The nucleus is the most densely compacted part of the atom, it is in the center circled by the electron cloud or shells. It is filled with positively charged protons, and neutrons which have no charge. It is smaller than the electron cloud in size, but in quantity it has more subatomic particles since protons and electrons are equal and the nucleus has nuetrons
The answer is 79 I believe
Answer:
A.He added bleach to the samples.
Explanation:
Bleach destroys the chemical composition of bacteria. Adding mold spores, freezing samples, and raising the temperature all result in physical changes, but not chemical changes, so specimens remain alive.
