what hold electrons in a covalent bond it is the fact that two electrons are paired in the same orbital

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart

According to thomson, the atom is a positively charged cloud with electrons scattered throughout. what would the alpha particles do when they hit the foil if thomson were correct