Which element has a complete valence electron shell?

selenium (Se)

oxygen (O)

fluorine (F)

argon (Ar)

If you measured the mass of an apple in New York, and then again in China, how would the masses compare? OA) The mass in New York would be larger. OB) The mass in New York would be smaller. OC) The masses in both locations would be the same.

Which of the following elements is less reactive than the others? Bromine (Br) Oxygen (O) Selenium (Se) Sulfur (S)

Briefly explain how electron orbitals and energy levels relate to the structure of an atom.

A mixture of nitrogen and neon gas is compressed from a volume of to a volume of, while the pressure is held constant at. Calculate the work done on the gas mixture.

Which technology works in conjunction with electronic collars to enable scientists to track endangered animals?

How many molecules are in 1.2 moles of H20?

Which of the following is diamagnetic? A) Sn B) Pb 2+ C) I D) N E) All are paramagnetic

Based on your observations in the lab, what do you think happens to the majority of water (not, ice) at the poles? at the equator?

How do organisms interact with each other and how can one organism be dependent upon other species

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission