Atomic mass. Which is the number of protons and neutrons combined.
It'll beginning to evaporate.
Answer:
True
Explanation:
The evidence for evolution is found at all levels of organization in living things and in the extinct species we know about through fossils.
Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. Some points will be nice
