choose the three correct.
a. Nitrogen is located in Group 2A, Period 5.
Selected:b. Nitrogen is located in Group 5A, Period 2.This answer is correct.
Selected:c. Nitrogen has 2 valence electrons. The valence electrons are located in the 5th energy level.This answer is incorrect.
d. Nitrogen has 5 valence electrons. The valence electrons are located in the 2nd energy level.
Selected:e. Nitrogen will gain 3 valence electrons in an ionic bond to form a 3- ion.This answer is correct.
f. Nitrogen will lose its five valence electrons in an ionic bond to form a 5+ ion.