Which of the following does each different kind of atom represent?

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.

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle