Which grouping of circles, when considered in order from the top to the bottom, best represents the relative size of the atoms of li, na, k, and rb, respectively?.

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

Give the brainliestwhich parts of the scientific process differentiate it from pseudoscience? check all that apply. stating facts based on opinionsusing models and experimentsasking new questionsmaking subjective claimshaving explanations that answer all questionsi need more than one answer

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy