Interpretation: The valence electron configuration for halogens is to be stated. The reason for the increase in the melting and boiling point from
Concept introduction: Halogen elements are highly reactive. All are nonmetals. They form hydrides when react with hydrogen.
To determine: The valence electron configuration for halogens; the reason for the increase in the melting and boiling point from
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EBK CHEMISTRY: AN ATOMS FIRST APPROACH
- Alumina, Al2O3, is amphoteric. Among examples of its amphoteric character are the reactions that occur when Al2O3 is heated strongly or fused with acidic oxides and basic oxides. (a) Write a balanced equation for the reaction of alumina with silica, an acidic oxide, to give aluminum metasilicate, Al2(SiO3)3. (b) Write a balanced equation for the reaction of alumina with the basic oxide CaO to give calcium aluminate, Ca(AlO2)2.arrow_forwardThe amount of sodium hypochlorite in a bleach solution can be determined by using a given volume of bleach to oxidize excess iodide ion to iodine; ClO- is reduced to Cl-. The amount of iodine produced by the redox reaction is determined by titration with sodium thiosulfate, Na2S2O3; I2 is reduced to I-. The sodium thiosulfate is oxidized to sodium tetrathionate, Na2S4O6. In this analysis, potassium iodide was added in excess to 5.00 mL of bleach (d=1.00g/cm3) . If 25.00 mL of 0.0700 M Na2S2O3 was required to reduce all the iodine produced by the bleach back to iodide, what is the mass percent of NaClO in the bleach?arrow_forwardGive the formula for the acidic oxide of (a) HNO3 (b) HNO2 (c) H2SO4arrow_forward
- How can the paramagnetism of O2 be explained using the molecular orbital model?arrow_forwardDefine the bonding that exists in metals and how this model explains some of the unique physical properties of metals. What are metal alloys? Identify the two main types of alloys, and describe how their structures differ. Give several examples of each type of alloy.arrow_forward
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