Nf3 has three f atoms bonded to a central n atom, with one lone electron
pair on the n. what is the shape of this molecule?
o
a. tetrahedral
o
b. trigonal planar
o
c. bent
o
d. trigonal pyramidal

D Trigonal pyramidal

Explanation:

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).