PLEASE HELP!! According to the shell model, which should experience the greater effective nuclear charge, an electron in

a. carbon's 1st shell or silicon's 1st shell?

b. carbon's 2nd shell or silicon's 2nd shell?

c. carbon's 2nd shell or silicon's 3rd shell?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.

How many peaks will be present in a mass spectrum for brcl?