Answer:
Oxygen comes 8th on the periodic table which is the atomic number.
Explanation:
but Oxygen 13 (Isotopes of Oxygen) is when oxygen has 8 protons and electrons, and 5 neutrons (8+5=13)
Answer:
???
Explanation:
i would help answer but your post has no diagrams or at least there not showing up
Answer:
3,6,6...................................
The answer is D, because "Animals without a backbone are invertebrates."