Which compound has a covalent bond?
Ca
CO
NaCl
MgO

It's either 3 or that ,,but if not than choose 4

A. volume stays constant. just took took the quiz

Electrons are emitted

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.