2.the image below shows two nitrogen atoms. for these two atoms to form a stable molecule, n2, how many electrons would have to be part of covalent bonds?

Since N2 is a covalent bond, the lewis dot structure of  N2 would have a triple bond. Each bond contains 2 electrons, so if it has a triple bond it contains 6 electrons. 
Calculate the number of valence electrons of N2
N= 2x 5 = 10 
N2 has a total of 10 valence electrons, to become stable each N atom needs 8 electrons. 
So, therefore, 6 electrons would have to be a part of covalent bonds because they share 6 electrons in a triple bond. 

Well technically there are two correct answers b and d. but for you its probably b in general.good day sir/ma'am : ) (i know not gender)

Green is technically every other color but green but the other wavelengths of the other colors get absorbed by the object and the wavelength of the color green gets reflected