Mendeleev's periodic table of elements was created in 1901.
O A. True
O B. False

Which of these conditions most likely produces an unstable isotope?

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

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both