The last element in any period always has: a. two electrons in the outermost energy level b. its outer energy level completed c. the properties of an inert gas d. the lowest atomic weight because it is a gas

Explain why scientists use shared characteristics to make cladograms.

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?