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kepler's 1st law of planetary motion is called the law of
ellipses
motion
equal areas
harmonics

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Work = force × a. work b. energy c. distance d. momentum

True or false graphs must include scales that increase by the same amount