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...
However, we've probably been doing so on charts that look like this: But since we're blasting ahead in math, we'll soon be graphing on charts that look like this: This is called a Cartesian coordinate graph. It's made up of two axes (axes is just the plural of axis): The horizontal axis is called the x-axis. And the vertical one is the y-axis. When the two axes meet, they form four quadrants.