Answer:
False. The biggest difference between elements and molecules is not related to the concept of "killing" multiple types of atoms. The statement is also not accurate.
The main difference between elements and molecules is that elements are composed of only one type of atom, while molecules are composed of two or more atoms bonded together. Elements cannot be broken down into simpler substances by ordinary chemical means, while molecules can be broken down into their constituent atoms through chemical reactions. Molecules can consist of atoms of the same element (as in diatomic molecules like oxygen, O2) or atoms of different elements (as in water, H2O, which consists of hydrogen and oxygen atoms).