A student observes that element X has a completely filled outer electron shell. Give two conclusions the student can draw from this observation, and justify each conclusion.

Geothermal energy for industrial use is available almost anywhere. a. true b. false

How do dying stars contribute to the formation of planets

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .