PLEASE I NEED HELP A student uses the periodic table to map out the trend in increasing atomic radii. During peer feedback, a student mentions that her trend is incorrect. Which model and explanation should the student use to help the student understand?

The third one, or the first one in the second picture.

i read up on this like a year ago so i think i’m right but i can’t be too sure. i hope this helps you, good luck!

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .