Determine the temperature at which all of the nh4cl in mixture a dissolves to form a
saturated solution.

mention the spill to the teacher clean the area and throw the broken pieces away

explanation:

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.