Periodic Table of the Elements: Origins of the Elements

Periodic Table of the Elements 1+ 2+ 3+ 3- 2- s1 s2 d1 d2 d3 d4 d5 d6 d7 d8 element name atomic number symbol 2001 atomic mass KEY 2- most common

The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows and columns

periodic table The periodic table contains seven periods 5 In each period, the elements' atomic numbers increase from

pg soft slot The number of elements in a period increases as one moves down the periodic table because as the energy level of the atom increases, the number of energy sub-