This is a collection of nickel facts. Nickel is the element with symbol Ni and atomic number 28. It is an important transition metal.| Science Notes and Projects
Get facts about the element technetium, which is atomic number 43 and element symbol Tc. See the uses of isotope technetium-99.| Science Notes and Projects
Learn about the scientific definition of a heavy metal and why there is disagreement about it. Get facts about the toxicity of heavy metals.| Science Notes and Projects
Learn what the main group elements are, which elements are included, and why these elements are important.| Science Notes and Projects
Learn about the post-transition metals or basic metals. Get a list of elements and discover their shared properties.| Science Notes and Projects
Learn about valence electrons. Get the definition and a periodic table showing the number of valence electrons for each element.| Science Notes and Projects