Answer:
When water droplets get too heavy.
Explanation:
Hope this helps.
A quantitative observation must be a measurement of some sort. (Something including numbers). Qualitative, on the other hand, is when you are using words to describe what has happened.
To find average atomic mass, multiply each isotope's atomic mass with its relative abundance and add it all up.
15.012*0.1423 + 16.988*0.3348 + 19.177*0.5229 = 17.851 (5 s.f.)
Environmental consultant.
Environmental education officer.
Environmental engineer.
Almost all the mass of an atom is located in its nucleus.
