Answer: Protons
Explanation: Every atom is defined by its protons every element. So if it has 1 proton its hydrogen no matter what. If it has 2 protons its helium no matter what and so on. So if you know the number of protons you know the element.
The atomic number tells you the number of protons that are in the core of a particular element.
Answer:
water is the most abundant molecule in the body
This climate is warm.
The animals in the tundra are strong to live in such an environment.
I don't know what the rest of that stuff is sorry.
Answer:
proteins is the answer of this question
