What is the highest percentage of water vapor that could be in the air hurry

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Connect the whole numbers on the periodic table to indicate what they represent?