What requirements must a molecule meet in order to be considered nonpolar?

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Helium decays to form lithium. which equation correctly describes this decay?

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.