A scuba tank is filled with a mixture of three gases (argon, nitrogen and oxygen) as total pressure of 490 kPa If the partial pressure of argon is 5 kPa and
nitrogen is 225 kPa, What is the pressure of oxygen in the tank? *

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What happens to isotopes that are unstable?