based on the results in the introductory activity, what if anything is the product when potassium or sodium bicarbonate is heated at 100 degrees Celsius to 200 degrees Celsius? Does this product undergo further decomposition at this temperature

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

what is the question here. i think you messed up.