Heated gaseous atoms of elements emit light in unique colored patterns as electrons drop from excited energy states to ground energy states. Heated hydrogen atoms have only four colored
lines, red, green, blue and violet. What prediction did Niels Bohr make about electrons based on
this information?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

What shape would a molecule with two bound groups and two lone pairs have?