Proton N: Neutron
Electron
7. The following questions refer to the atom on the right:
A. This atom's atomic mass is 14
B. This atom's atomic number is 7
C. How many electrons are in this
atom's valence shell? 7
D. Is this atom likely or unlikely to react with other atoms?

answer: 4

explanation: 8

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

atp is used for energy.