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.
A= p r2. The relationship of the diameter to the circumference of a circle is defined as: circumference is 3.14 (p) times the diameter. So the formula is written as:: p d. So this can also be wrttten as 2rd (diameter = 2 time radius). You will appreciate the visual for measuring circles in this About.com video.