What are the names and symbols of common elements?

Hydrogen (H) and helium (He) are the lightest, and hydrogen, carbon (C), oxygen (O) and nitrogen (N) are found in organic molecules. Some of the metals include sodium (Na), gold (Au), silver (Ag), iron (Fe), copper (Cu) and aluminum (Al).

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nah.   i'm just sleepy.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.