“during times of personal crisis we may feel the need to engage the services of a therapist to help us with out problems” fact or opinion and why

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which compound most likely has the greatest bond energy?