How Negative Are You Compared To This Element?

Which biomolecule is the main source of energy for living organisms?
Which blood cells help fight infections?
Which blood vessels carry oxygen-rich blood to the heart?
Which element has the highest electronegativity?
Which energy source is renewable?
What type of bond is formed when atoms share electrons?
Which famous scientist developed the theory of relativity?
Which force pulls objects toward the center of the Earth?
Which force slows down a moving object on a surface?
Which gas do humans inhale for respiration?