Rank the following materials from fastest to slowest speed of sound traveling
through it:

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.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?