Online Chemistry Explorer

  What are Alkaline Earth Metals? The alkaline earth metals are all of the elements in the second column of the periodic table. This group includes beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The word 'alkaline' refers the basic nature of the compounds they form when bonded with oxygen. Alkaline earth metals have relatively low ionization energies for their first two electrons; because of this, alkaline earth metals exist with a 2+ charge most of the time. Electronic configuration Alkaline earth metals have a corresponding [Noble gas] ns2 electronic configuration. So, all alkali earth metals have two electrons in their outermost layer of electrons.    Physical and chemical Properties Group 2 elements are highly reactive metals because they tend to lose their two valence electrons to achieve a stable electron configuration. They have higher melting and boiling points than alkali metals because of their strong metalli...

  What are Alkali Metals? Alkali metals are s-block elements located in the leftmost side of the periodic table.   The word ‘alkali’ refers to the basic or alkaline nature of their metal hydroxides. Alkali metals are a group of six chemical elements in the first column of the periodi c table namely Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).  Electronic configuration Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. So, all alkali metals have one electron in their outermost layer of electrons.    Physical and chemical Properties: Like all metals alkali metals are shiny in appearance and good conductors of electricity; however, they are soft and highly reactive. They have low melting points and react easily with air and moisture. Because of their reactivity, special precautions are needed when using and storing them.  Francium is a radioactive element ...

  What is the periodic table? The periodic table of elements is a tabular arrangement of chemical elements arranged by increasing atomic number  from the element with the lowest atomic number,  hydrogen , to the element with the highest atomic number,  oganessian . The atomic number of an element is the number of  protons  in the nucleus of an  atom  of that element. Hydrogen has 1 proton, and Oganessian has 118. oganessian Why is the Periodic Table so Important? A periodic table is an important tool for a scientist which categorized and organized a large volume of information into a very handy tool. Scientist Mendeleev published his first version of the periodic table and today there are 118 known elements in the periodic table.  Symbols Each element has a symbol, which is one or two letters. The first letter is always capitalized. If there is a second letter, it is lowercase. Symbol of first ten elements of the periodic table in given...