periodic table of elements
Periodic table
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 is arranged by atomic weight and valence electrons These variables allowed Mendeleev to place each element in a certain row It is called periodic because elements are lined up in cycles or periods From left to right elements are lined up in rows based on their atomic number (the
ก่อนจะนิ่งก็ต้องกลิ้งมาก่อน The periodic table is the tabular arrangement of all the chemical elements on the basis of their respective atomic numbers In the periodic table, A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar
