I would say 6.022<span>⋅1023 atom</span>
A rule of thumb is that elements in the same column or "group" have similar chemical properties. Answer D. has four elements that are all in group 2, or the "alkaline earth metals". The answer is <span>D. 4, 20, 38, 88</span>
Answer:
one_falf.
Explanation:
Cuz for a first order rection is half life independent of concentration and constant over time.
Molecular and Microbiology