A vertical column in the periodic table. Members of a group typically have similar properties and electron configurations in their outer shell. Period. A horizontal row in the periodic table. The atomic number of each element increases by one, reading from left to right.
circumference - the length of the closed curve of a circle. length - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; the length of the table was 5 feet. sextant - a unit of angular distance equal to 60 degrees.
More About Circumference. 1  The formula for the circumference of a circle, C = 2 Ã Ï Ã r = Ï &times d, where `r` is the radius and `d` is the diameter of the circle.Ï =22/7 = 3.141. 2  Another name for circumference is perimeter.