Based on the atoms which ones would be in the same period?

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 moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

What is the mass of 8 moles of sodium atoms