What subscripts are needed to complete the formula unit li_n_? 1,1 3,1 1,3 3,3

In this problem we need to obtain a molecule with a neutral charge that also satisfies the noble gas configuration. Lithium (Li) is a group 1 metal so it needs to lose an electron to achieve noble gas configuration. The loss of an electron will give it a (+1) charge. In contrast, Nitrogen (N) is a group 5 element and needs to gain 3 electrons to achieve noble gas, hence it has a charge of (-3) charge. A neutral molecule has the sum of  oxidation states of all atoms equal to zero. Hence 3 molecules of lithium and 1 molecule of nitrogen give a neutral molecule.

Therefore 3,1 is the correct answer,

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be