Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it?

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

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

In salt water solution,the salt is the blank