Answer: letter D. Most of the mass of an atom comes from elctron cloud
Step-by-step explanation: your welcome and have a good day
Answer:
The answer is 2.5
The next blank is 6
an = (1 + 2·(n - 1))/2^(n - 1) = 2^(1 - n)·(2·n - 1)
sn = 6 - 2·0.5^n·(2·n + 3)
The answer would be
99.2
