If each orbital can hold a maximum of two electrons, how many electrons can 2s hold?

How manyatoms of mercury are in 1.4214e+1 ml sample

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

What does the mass of 0.7891 mol of ferric oxide (fe2o3)