Atoms gain or lose valence electrons until they have the same number of valence electrons as the closest atmospheric gas

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.