31:22Periodic Table of Elements Explained - Metals, Nonmetals, Valence Electrons, ChargesThe Organic Chemistry Tutor454views2rank
03:40How The Periodic Table Organizes the Elements | Chemistry BasicsAmerican Chemical Society404views
08:34The Periodic Table EXPLAINED | Chemical Families and Periodic TrendsThe Science Classroom1013views
Textbook QuestionFour of the boxes in the following periodic table are colored. Which of these are metals and which are nonmetals?366views
Textbook QuestionExamine Figure 2.3, The periodic table. (f) Classify the following three elements as metals, nonmet-als, or semimetals: Mo, Br, Si.382views
Textbook QuestionDiscussing this chapter, a classmate says, 'Since elements that form cations are metals and elements that form anions are nonmetals, elements that do not form ions are metalloids.' Do you agree or disagree?689views1comments
Textbook QuestionWhere in the periodic table are the metallic elements found? Where are the nonmetallic elements found?743views
Textbook QuestionClassify the following elements as metals, nonmetals, or semimetals: (a) Ti (b) Te (c) Se (d) Sc (e) Si695views
Textbook QuestionClassify the following elements as metals, nonmetals, or semimetals: (a) Ar (b) Sb (c) Mo (d) Cl (e) N (f) Mg657views
Textbook QuestionWrite the symbol for each element and classify it as a metal, nonmetal, or metalloid. a. gold b. fluorine c. sodium d. tin e. argon1065views
Textbook QuestionAt room temperature, a certain element is found to be a soft, silver-colored solid that reacts violently with water and is a good conductor of electricity. Is the element likely to be a metal, a nonmetal, or a semimetal?892views
Textbook QuestionAt room temperature, a certain element is found to be a shiny, silver-colored solid that is a poor conductor of electricity. When a sample of the element is hit with a hammer, it shatters. Is the element likely to be a metal, a nonmetal, or a semimetal?802views
Textbook QuestionAt room temperature, a certain element is yellow crystalline solid. It does not conduct electricity and when hit with a hammer, it shatters. Is the element likely to be a metal, a nonmetal, or a semimetal?479views
Textbook QuestionAt room temperature, a certain element is a colorless, unre-active gas. Is the element likely to be a metal, a nonmetal, or a semimetal?960views
Textbook QuestionLittle is known about the properties of astatine, At, because of its rarity and high radioactivity. Nevertheless, it is possible for us to make many predictions about its properties. (a) Do you expect the element to be a gas, liquid, or solid at room temperature? Explain.986views
Textbook QuestionElement X reacts with element Y to give a product containing X3+ ions and Y2-ions. (b) Is element Y likely to be a metal or a nonmetal? Explain.738views
Textbook QuestionElement X reacts with element Y to give a product containing X3+ ions and Y2-ions. (a) Is element X likely to be a metal or a nonmetal? Explain.367views
Textbook QuestionA historian discovers a nineteenth-century notebook in which some observations, dated 1822, were recorded on a substance thought to be a new element. Here are some of the data recorded in the notebook: 'Ductile, silver-white, metallic looking. Softer than lead. Unaffected by water. Stable in air. Melting point: 153 °C. Density: 7.3 g>cm3. Electrical conductivity: 20% that of copper. Hardness: About 1% as hard as iron. When 4.20 g of the unknown is heated in an excess of oxygen, 5.08 g of a white solid is formed. The solid could be sublimed by heating to over 800 °C.' (a) Using information in the text and the CRC Handbook of Chemistry and Physics, and making allowances for possible variations in numbers from current values, identify the element reported.463views
Open QuestionFor metalloids on the periodic table, how do the group number and the period number relate?183views
Open QuestionWhich of these properties is the best one to use for the identification of an element?159views
Open QuestionWhich groups of the modern periodic table contain elements that are classified as metalloids?134views
Open QuestionWhich are elements that have the physical and chemical properties of both metals and nonmetals?133views