Chapter 19: Elements and their Properties Date:_____________ Section 2: Metals, Nonmetals, and Metalloids - Notes Learning Goals: Describe the properties of typical metals, nonmetals, and metalloids. Explain what the terms metal, nonmetal, and metalloid mean. Properties of Metals: Metals can be found to the _____________ of the “staircase” on the periodic table. o Almost all __________________ • _________________________ (Hg) is the exception! o _________________________________________________ of heat and electricity o They ________________________________ (shiny, luster) o _______________________________: they can be hammered or rolled into sheets o ___________________________: they can be drawn into wires The atoms of metals generally have ______________________________________________________. In chemical reactions, metals tend to ________________________________________________ easily. o When metals combine with nonmetals, the atoms tend to ________________ electrons to the atoms of nonmetals, forming ________________________________. _________________________________: positively charged metallic ions are surrounded by a cloud of electrons. o The outer-level electrons are not tightly held to the __________________________ and can move _____________________________ among the charged ions. Properties of Nonmetals: Nonmetals: elements that usually are ____________________ or ______________________________ at room temperature. o The solids ___________________________________ (brittle) and are not malleable or ductile. o Most nonmetals ______________________________________ heat or electricity well and are not shiny. The electrons of nonmetals are _________________________________________ to the nucleus of the atom. o They can form ionic bonds, in which they _______________ electrons from metals. o They can also form ___________________________________________, in which they share electrons with other nonmetals. About 90% of all atoms in the universe are ___________________________________ atoms! Hydrogen is a _____________________________________________: o Consists of ______________ atoms of the same element in a covalent bond. o ________ o ____________________________________________________________________________ Properties of Metalloids: Metalloids can form ionic and covalent bonds with other elements and can have both ________________________________ and ______________________________________ properties. Some metalloids can conduct electricity better than most nonmetals, but not as well as ____________________. Metalloids can also be called ___________________________________________: o Semiconductors: elements than conduct an electric current under ______________________ _________________________________.