Certain

properties of the elements contain tendencies called periodic trends, which

increase or decrease as it progresses along a row, called a period, or column,

which is called a group, of the periodic table. Periodic trends are present in

both physical and atomic properties of the elements. Scientists use these

trends to predict the properties of elements and their reactions in certain

situations. Quasiperiodic trends are far more unpredictable, with no overall

trend occurring. The goal for this investigation was to make graphs of these

properties and determine which properties followed a periodic trend or a

quasiperiodic trend. The guiding question asked, “Which properties of the

elements follow a periodic trend?”. This question can be answered by

determining the trend of certain properties.

To start us off, we had an excel

sheet that listed and organized all elements on the periodic table with

information about the atomic mass, density, and electronegativity of each

element. We separated our group and created 6 graphs to analyze the trends of atomic

mass and electronegativity. We found that atomic mass follows periodic trends,

going upward. The reason why we used a scatter plot because it tracks all

points of data which then can show trend lines and their relativity to the

information. We can identify trends through the graphs, by seeing the relativity

between all the information whether or not it is increasing or decreasing in

both period and group. This data was helpful in answering the guiding question

because it shows the information we were looking for, revealing which

properties of elements follow a periodic trend.

My group’s claim was that only

atomic mass follows a periodic trend. We found that atomic mass does follow a

periodic trend, but electronegativity does not. We can see this in the graphs

below, with atomic mass following a periodic trend, and electronegativity

following a more quasiperiodic trend. Another group’s claim was that

electronegativity followed a periodic trend, however, in the graphs shown, it

does not. Graphs 1, 2, 3, and 4 show atomic mass, it is a periodic trend because

the data shows a linear trend. Graphs 2 and 6 follow a quasiperiodic trend

because it does follow a linear function, which gives the trend

unpredictability.