The UNIT in which the rate of flow of charge is measured, is called what​

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.

Can someone explain to me how to do this problem ?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass