Mixed GroupsProperties of MetalloidsMetalloids form ionic and
covalent bonds with other elements and can have metallic and
nonmetallic propertiesMetalloids will generally conduct electricity
better than nonmetals but not as good as metals giving them the
name semiconductor Metalloids are found along the stair-step line
(exception of aluminum) found in groups 13, 14, 15, 16, and 17Boron
groupGroup 13Has 3 valence electrons (valence electrons the
electrons in the outermost shell of the atom)Important
elementAluminum most abundant metal in Earths crustStrong and light
used in construction of airplanes
Carbon GroupGroup 144 valence electronsImportant elementsAll
organic compounds contain Carbon but not all carbon compounds are
organicSilicon second most abundant element found in Earths crust
(most found as sand SiO2)AllotropesAllotropes are different forms
of the same element having different molecular structures
The Nitrogen GroupGroup 155 valence electronsEach breath you
take is about 80 percent gaseous nitrogen.The Oxygen GroupGroup
16Oxygen makes up about 21% of air exists as a diatomic molecule
(diatomic molecule a molecule that consists of two atoms of the
same element) O2Synthetic ElementsElements scientists have made by
smashing existing elements with particles.Classwork/HomeworkPage
596-597Write and answer questions 1-15
