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...
axis The horizontal and vertical lines that form the quadrants of the coordinate plane. The horizontal axis is usually called the x-axis, the vertical axis is usually called the y-axis. axis of symmetry A line that passes through a figure in such a way that the part of the figure on one side of the line is a mirror reflection of the part on the other side of the line. Calculating...