Chemistry Class # 9 Ch # 1 Quiz # 3 Welcome to your Chemistry Class # 9 Ch # 1 Quiz # 3 1. Average atomic mass is the weighted average of the atomic masses of the naturally occurring __________ of an element.MoleculesIsotopesAtomic numberNone of these 2. Mass number of Oxygen atom is19341614 3. Mass number is equal to the sum of number of protons + number of ___________.ElectronsAtomsNeutronsElements 4. The number of proton present in the nucleus of an atom is called ____________mass numberatomic numberboth of themnone of them 5. Atomic number is represented by _____QZMA 6. Examples of heterogeneous mixture isSandGlucoseDirtboth dirt and sand 7. A mixture having uniform composition throughout its mass is calledHeterogeneous mixtureHomogeneous mixtureBoth of themNone of them 8. Example of homogeneous mixture issanddirtNaCl dissolved in waterPetrol 9. Chemical formula of bleaching powder isCaONaClHClCaOCl2 10. Chemical name of caustic soda issodium chloridemethanesodium hydroxideKerosene 11. The symbol of Gold isGoGuAlAu 12. __________ is generally known as the father of Chemistry.Al BeruniAl FarabiIbne SinaJabber Ibne Haiyan 13. Distillation is a chemical method which were introduced by _______GreeksRomansMuslimsNone of them 14. Atomic mass unit is the mass of 1/12 of the mass of any atom ofGasCarbon-12GoldIron 15. Number of naturally occurring elements are52824292 16. The symbol of Fluorine isFlFuFFe 17. Each element consists of only ______ kind of atoms.OneThreeFourTwo 18. The symbol of lead isLLePbLa 19. The chemical formula of Sodium nitrate isNaClNaNO3NaHClCH4 20. A widely used example of mixture is __________GlassRubberPlasticAlloys Time is Up!