I need to know the measurements of this to the appropriate amount of significant figures

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li