What evidence did you see or read about in the article that makes you think this?

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?