Excluding the noble gas group, how does the number of valence electrons in an element influence its chemical reactivity?
O A. Elements with intermediate numbers of valence electrons are the
most reactive.
B. Elements with the lowest numbers of valence electrons are the
least reactive
C. Elements with an even number of valence electrons are the most
reactive.
D. Elements with intermediate numbers of valence electrons are the
least reactive.

It indicates no change in temperature and the process of matter changing its state

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

If its history of, then b) because a) implies only present day (now)