A period on the periodic table is a horizontal row. The atoms in this row show a trend in their width, and in the amount of work needed to make them an ion, among the fe â¦ w other similarities.
The x-axis and y-axis Remembered! The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
We often want to show data in the form of a graph. The horizontal axis is labeled x-axis, a name which we often use for it. The vertical axis is labeled y-axis. We often label the variables which are plotted on the x-axis and y-axis x and y.