An oxygen atom has 8 protons, 8 neutrons and 8 electrons.
A) Its atomic number is 16.
B) Its mass number is 8.
C) It has 4 electrons in the first energy level (electron shell) .
D) It has 6 electrons in the outermost energy level (electron shell) .
E) It has 8 electrons in the outermost energy level (electron shell) .
Correct Answer:
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