How many electrons would a neutral atom of nitrogen need to gain in order to have a full valence electron shell?

Iknow the answer is a but i don't know why

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.