What structure do all of these elements have in common? boron, carbon, nitrogen, oxygen, flourine.

a) number of protons
b) numbers of electrons
c) number of energy levels
d) number of valence electrons

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?