As in DNA replication, RNA is synthesized in the 5' â 3' direction (from the point of view of the growing RNA transcript). Only one of the two DNA strands is transcribed. This strand is called the template strand, because it provides the template for ordering the sequence of nucleotides in an RNA transcript.
The properties of the chemical elements are summarized on the periodic table, which organizes the elements by increasing atomic number into rows (periods) in which the columns (groups) share recurring (periodic) physical and chemical properties.
Periodic Table of the Elements. The periodic table is an arrangement of the chemical elements that is a powerful tool for studying those elements and how they combine. The elements are arranged in rows according to their atomic number and in columns according to their valence electrons or number of electrons in the outer shell.