Nitrogen has atomic number of seven. Which of the following must be true based on the fact? 1. An atom of nitrogen must have seven electrons

2. Them of nitrogen must have three protons and four electrons

3. An atom of nitrogen must have seven protons

4.An atom of nitrogen must have for protons and three electrons

answer; ///(b) it is composed of four protein chains and four heme groups;

yes? sounds right, but you didn’t ask a question.

meiosis is the correct answer

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high