When flying in an airplane, you are most likely in which layer of the atmosphere? a. troposphere b. thermosphere c. stratosphere d. mesosphere

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.

How have the competing explanations' experiments on atoms affected the development of the atomic model?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body