C) hydrogen and oxygen atoms
Answer:
I think its C but if its not try A then
Explanation:
Radius of atoms increase as you go down, can decrease from left to right in certain periods
Answer:
Vertebrae
Explanation:
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.
Answer: 5 protons 6 neutrons and 5 electrons. and atomic number is 5.
Hope this helps!
