Answer:
C.11
Explanation:
Boron-11 makes up around 80% of all natural Boron. And, typically, the quickest way to determine the most abundant isotope of an element is to just round the atomic mass to the nearest whole number.
The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.
Answer:
B is most volatile, A is least volatile
Explanation:
1) deep trenches
2) active volcanoes
3) arcs of islands along the tectonic boundaries
4) in some cases, mountain ranges
