The electrons in the outermost energy level of an atom that influence how an element will react with other substances

Why do consumers feel warmer after eating a meal

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a