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...
1 With a chart, the y-axis is the vertical data that is typically on the right-side of the chart. 2  In computer graphics, if you wanted to draw a horizontal line the x-axis can be used to determine the start and end point of the line. 3  Drawing a two-dimensional object would require only the x-axis and y-axis.