They, along with the lanthanides, are often called "the f-elements" because they have valence electrons in the f shell. These properties apply to the metals in general (alkali metals, alkaline earth, transition metals, basic metals, lanthanides, actinides) and nonmetals in general (nonmetals… Metals are classified as basic metals, alkali metals, transition metals, alkaline earth metals, lanthanides and actinides. The periodic table is organized in families and periods. Metals Most elements are metals. All actinides are pyrophoric, especially when finely divided, that is, they spontaneously ignite upon reaction with air at or below 55 °C (130 °F). These properties apply to the metals in general (alkali metals, alkaline earth, transition metals, basic metals, lanthanides, actinides) and nonmetals in general (nonmetals, halogens, noble gases). Definition of Non-Metals. 80%. They are often called the "inner transition metals." left side. Actinides. On the periodic table, metals are separated from nonmetals by a zig-zag line stepping through carbon, phosphorus, selenium, iodine, and radon. what % of the periodic table is metals? ... metals, nonmetals and metalloids. what side of the periodic table do the metals occupy? There are thirty total elements in the lanthanides and actinides. Properties of Non-Metals. For example, they are not malleable, they have relatively low density, they are dull, and they are poor conductors of heat and electricity, etc. Usually, they are shown as two rows on a separate section with the top row, elements 57 – 57, for the lanthanide and the bottom row, elements 89 – 103, for the actinides. These elements are located on the right side of the periodic table, (exception is hydrogen placed on the top left). The lanthanides and actinides are placed below on the periodic table and are said as specific types of transition metals. The Complete List of Non-Metals. They have low boiling and melting points. what are characteristics of metals? comparing the metals and nonmetals Here’s a comparison of the physical and chemical properties of the metals and nonmetals. Although separate on the periodic table, lanthanides and actinides are really specific types of transition metals. The lanthanides and actinides refer to the two families of mostly radioactive metals in an off-shoot of the periodic table. They are all radioactive. These are elements found on the left side of the periodic table and they tend to exhibit metallic behaviour. Comparing the Metals and Nonmetals. Actinides and lanthanides are chemical elements that are found in the f block of the periodic table of elements.This means their valence electrons are in the f orbital of their atoms. Read More: Difference between Acid and Base What are the Metals? Mercury. This includes the alkali metals, alkaline earth metals, transition metals, lanthanides, and actinides. The crystal structures of protactinium, uranium, neptunium and plutonium do not have clear analogs among the lanthanides and are more similar to those of the 3d-transition metals. Main Difference – Actinides vs Lanthanides. Metals In the periodic table, you can see a stair-stepped line starting at Boron (B), … The actinides comprise elements 89 through 103. The chart below displays a comparison of the physical and chemical properties of the metals and nonmetals. Nonmetals. Most elements are metals. lanthanides (rare earths) and actinides. Lanthanides The lanthanides are the elements with atomic numbers from 57 to 71. One useful way is by metals, nonmetals, and metalloids. These 15 metals (along with scandium and yttrium) are often called the rare earth elements. Only thorium and uranium are naturally occurring actinides with significant abundance. These chemical elements are found as metals and are called inner transition metals. 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