periodic table

periodic table   Dan periodic table of elements

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-

Select the component elements in the periodic table below, then choose the desired system from the panel on the right  The interactive periodic table of elements

ตดบ่อยมาก  1 H · hydrogen 2A 2 The Periodic Table of the Elements ; 3 Li lithium 4 Be beryllium · 11 Na sodium  What is the periodic table? The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowes