A. 3
From 0 to 6, a solution is acidic. 7 is neutral and from 8 to 14.. is basic
It matters to the aerodynamics of it because sometimes it's good to have the weight but only if it can take it.
I believe your answer would be helium friend :)
Answer:
The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
Explanation:
I hope this helped!
Answer:
diamond is denser because it is more tightly packed than coal
