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...
The vertical axis on the graph is your y- axis. Your y-axis is where you plot your y-intercept, or starting point, when you are graphing. In other words, your y-axis is the up and down line on your graph. Where the red line intercepts with the two is your y-axis.