What is the frequency of radiation.

Can someone me with questions 12 and 13 plz.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph