Which element has a complete valence electron shell?

selenium (Se)

oxygen (O)

fluorine (F)

argon (Ar)

Suppose that on a hot and sticky afternoon in the spring, a tornado passes over the high school. If the air pressure in the lab (volume of 180 m3) was 1.1 atm before the storm and 0.

What kinds of sacrifices do governments face when considering how to reduce greenhouse gases?

A cube has the following dimensions: 7 cm x 8 cm x 10 cm and has a density of 45 g/cm3. Calculate the mass.

What do all hypotheses have in common? A - They are proposed at the beginning of the scientific process B - They are tested by experimentation C - They are rejected due to growing evidence D - They become accepted scientific knowledge

A gas has a pressure of 98kPa at 75.0°C, what is the new temperature if the pressure is reduced to 10kPa?

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?

When a radioactive decay occurs what is released? A. Only protons and neutrons B. Only electrons C. Protons/Neutrons, beta particle, gamma ray D. Only gamma rays

How is the process of scientific inquiry and the design process similar and how they are different.

Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.