Why do elements that make positive ions occur on the left side of the periodic table while those that make negative ions occur on the right?

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

A6.10 m nacl can be made by adding [x]g of nacl to a container and making the volume of water up to the 1.00 l line

Matches the chemical name of each oxide of phosphorus to its chemical formula