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...
x-values are plotted with the horizontal axis, and y-values are plotted with the vertical axis. xy-graph. xy-graph. y-axis-The vertical axis of a graph, with which the y-values are plotted. y-coordinate-The number which corresponds to the value of y in an ordered pair.