Which element forms a cation?
A. gold
B. phosphorus
C. fluorine
D. nitrogen

What is the mass of each element in a 324.8 sample of co2

How are isotopes of the same chemical element alike? how are they different?

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