Atoms of metallic elements can form ionic bonds, but they aren't very good at forming covalent bonds. why?

This drawing shows a human body system. what is the primary function of this body system?

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —

Which of these is a physical property