Basic Concepts of ChemistryElements, Compounds and Mixtures6Choose the best answerIn known elements, the maximum number is of:AMetalsBNon-metalsCMetalloidsDNone of these Like 1 Discuss 0Share
Fundamental Concepts of ChemistryElements, Compounds and Mixtures7Choose the best answerWhich statement best describes a compound?ATwo or more elements physically mixedBTwo or more elements chemically combinedCA mixture of two or more substancesDA substance separable by filtration Like 0 Discuss 0Share
Basic Concepts of ChemistryElements, Compounds and Mixtures8Choose the best answerWhich of the following contains only one element?AMarbleBDiamondCGlassDSand Like 0 Discuss 0Share
Basic Concepts of ChemistryElements, Compounds and Mixtures9Choose the best answerWhich one of the following is not an element?ADiamondBGraphiteCSilicaDOzone Like 0 Discuss 0Share
Basic Concepts of ChemistryElements, Compounds and Mixtures10Choose the best answerAn element cannot:ABe present in a heterogeneous mixtureBBe present in a homogeneous mixtureCBe decomposed into simpler substances by ordinary chemical meansDCombine with another element to form a compound Like 0 Discuss 0Share