What can be concluded about the atom from knowing that oxygen 18 has an atomic number of 8?

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8