# Certain unpredictable, with no overall trend occurring.

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
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.

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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.