Scientists have changed the model of the atom as they have gathered new evidence. one of the atomic models is shown below.
a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle.
what experimental evidence led to the development of this atomic model from the one before it?
a few of the positive particles aimed at a gold foil seemed to bounce back.
the colors of light emitted from heated atoms had very specific energies.
equations were used to identify regions around the nucleus where electrons would likely be.
cathode rays were bent in the same way whenever a magnet was brought near them.

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.