The electron configuration below applies to which element? 1s2 2s2 2p6 3s2 3p1

What is the formula for calcium iodide

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

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm