Answer:
Basically, together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
Explanation:
Answer:
The answer is Physical. Physical immunity occurs when a person immune system responds to antigen.
Explanation:
As viruses cannot reproduce by themselves, they depend on the host cells that they infect to reproduce