The atoms form a double bond because there is a strong enough attraction in both directions and room for the electrons in the outer energy level of the atoms. The carbon atom and hydrogen atoms are ...

Innovative catalyst design enhances CO2 reduction efficiency by stabilizing the *COOH intermediate, revealing the impact of microenvironment on catalysis.

Save guides, add subjects and pick up where you left off with your BBC account. The slideshow shows a covalent bond being formed between a hydrogen atom and a chlorine atom, to form hydrogen chloride.