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.
Since the ratio of the circumference to the diameter in every circle equals pi, it is easy to determine the formula for finding circumference, C = . Students should remember from Chapter 7 that a diameter is twice the measure of a radius, so the formula C = 2 can also be used.