Just two strategies existed at the time to categorize these elements: separating them into metals and nonmetals or grouping them by an element's number of valence electrons (the electrons in the outermost shell). The first section of Mendeleev's book dealt with just eight of the known elements...
Periodic Table of Elements (Interactive) [PDF] - This Interactive Periodic Table is a tabular arrangement of the chemical elements, organized based on chemical element names, symbols, atomic masses, electron configuration and other chemical properties.
Seven valence electrons, so elements from this group typically exhibit a -1 oxidation state Noble Gases The noble gasses have complete valence electron shells, so they act differently. Unlike other groups, noble gasses are unreactive and have very low electronegativity or electron affinity. Periodic ...
Electron Configuration Shorthand: For elements in groups labeled A in the periodic table (IA, IIA, etc.), the number of valence electrons corresponds to the group number. Thus Li, Na, and other elements in group IA have one valence electron. Be, Mg, and other group-IIA elements have two...
Periodic Table of Elements Element Platinum � Pt Comprehensive data on the chemical element Platinum is provided on this page; including scores of properties, element names in many languages, most known nuclides of Platinum. Common chemical compounds are also provided for many elements. In ...
Elements in this family have 2 valence electrons. Lose their valence electrons to form a +2 charged ion. Form compounds with oxygen called oxides. Most compounds of alkaline earth metals do not dissolve easily in water. Belong to the s-block in the periodic table. ...
Periodic Table of Elements Comprehensive data on the chemical element Ytterbium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Ytterbium. Common chemical compounds are also provided for many elements. In addition technical terms are li...
(K), and other members of family IA are all soft, white, shiny metals. All elements in a family have the same number of valence electrons. Each horizontal row of elements is called a period. The elements in a period are not alike in properties. In fact, the properties change greatly ...
3. Valence electrons / chemical reactivity 4. Ionic and covalent bonds 1. Structure of the Atom Nature of the Atom The periodic table recognizes regular patterns in the atomic structure among the elements. A review of the structure of the atom is ...
Periodic Table of Elements Comprehensive data on the chemical element Nickel is provided on this page; including scores of properties, element names in many languages, most known nuclides of Nickel. Common chemical compounds are also provided for many elements. In addition technical terms are linked...