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 horizontal axis of a graph is also known as the x axis. Typically, the horizontal axis describes a quantity that changes in a predictable fashion. In the case of a scientific experiment, the horizontal axis usually denotes the control variable. This variable is deliberately controlled by the experimenter in order to determine the effects that change has on other variables.