How do you tell if an element is at an excited state based on its electron configuration?

How have the greenhouse gasses increased from the year 2000 to 2018

What shape would a molecule with two bound groups and two lone pairs have?

How can you write e method for the experiment of separating sand from water by filtration process? 1-materials 2-steps 3-conclusion also the same for the separating process of water and salt by filtration or distillation. quick because i need to finish my hw