2 A student investigates the absorption of beta (β) particles by a set of playing cards. Figure 1 shows the apparatus the student uses. Figure 1
The student changes the number of playing cards between the source and the detector. The student records the number of counts in each minute in Figure 2.
a i Complete Figure 2 below for 39 cards.
ii Complete Figure 2 below for 52 cards.

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

what experimental evidence led scientists to change from the previous model to this one?

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.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.