Answer
The lewis structure is shown in the picture.
Work Step by Step
1) Draw the N connected to each other and then connect one H to each N.
2) Count the number of valence electrons involved in the bonding, which is 6. There should be 5+5+1+1 =12e. So make one more bond.
3) Now there are 8 e.
4) Since N has already made three bonds and H has made one bond. Place the remaining electrons as lone pairs on both the N's.
4) Now count the valence electrons, it should be 12e.
