Astudent represented a water molecule using beads and straws. she connected two black beads and one white bead in a certain manner using straws. which of the following explains the type of scientific model created by the student?

A physical scientific model is a kind of model which is usually represented by using physical materials to explain the concept with deeper understanding.

Here, in this example the student represents the water molecule which contains 2 hydrogen and 1 oxygen atom using beads and shows the bond using the straws. This is an example of physical scientific model where physically a model is made to explain a concept.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.