Periodic Table of the Elements

Click an element to display its characteristics


H   He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba   Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra   La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu  
      Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr  

Name:
Number:
Weight:
Melting Point/
Freezing Point:
Boiling Point:

Legend
Noble Gasses Chemically, they are very stable and exhibit an extremely low chemical reactivity due to having the maximum number of valence electrons.
Halogens Halogens are highly reactive, and as such can be harmful or lethal to biological organisms in sufficient quantities.
Nonmetals A poor conductor of heat and electricity.
Metalloid "Middle elements" - conduct heat and electricity better than nonmetals, but not as well as metals.
Transition Metals A solid substance that is a good conductor of heat and electricity. Can be formed into many shapes. Transition elements tend to have high tensile strength, density and melting and boiling points.
Alkali Metals The alkali metals are all highly reactive and are rarely found in elemental form in nature. The alkali metals are silver-colored (caesium has a golden tinge), soft, low-density metals, which react readily with halogens to form ionic salts, and with water to form strongly alkaline (basic) hydroxides.
Alkaline Earth Metals The alkaline earth metals are silvery colored, soft, low-density metals, which react readily with halogens to form ionic salts, and with water, though not as rapidly as the alkali metals, to form strongly alkaline (basic) hydroxides.
Poor Metals Their melting and boiling points are generally lower than those of the transition metals and their electronegativity higher, and they are also softer.
Actinides All actinides are radioactive.
Lanthanides They are shiny and silvery-white, and tarnish easily when exposed to air. Many make steel. They react violently with most nonmetals. They are relatively soft but their hardness increases with their atomic number. Lanthanides burn in air. They have high melting and boiling points.