Answer:
boron , because the protons and electrons are 5 . and we all know that boron = 5.
28.5 is quantitative data
Answer:Warming of the Earth's climate and associated changes to oceans were the most likely causes of the extinctions. At the end of the Permian Period volcanic activity on a massive scale in what is now Siberia led to a huge outpouring of lava.
Explanation:
A. Sound is a form of mechanical energy
