For a comparative or experimental investigation, scientists often make a testable ___ about a scientific question, and then they test it in the investigation. A. Control B. Hypothesis C. Procedure D. System

Find the protons, electrons and neutrons for strontium with a mass of 83

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.