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40957576200Student’s name: ………………………………….. Date:18/11/2017ChemistryGrade : 10Term-1 Final ExamRevision SheetExam Date:Wednesday 6/12/2017CCS:10.Chem.1b,1c&1a,1e,1g,1d,1f,1h,1i,1jChapter(1):Matter and change.Section(1)&(2)&(3)Chapter(3):AtomsSection(1)&(2) * In the space provided, write the letter of the term or phrase that best completes each statement:1.Chemistry is a natural science that deals with the study ofa.living things and their life processes.b.the physical features of Earth.c.the composition, structure, properties, and changes of matter.d.the composition, motion, and relative positions of stars and planets.2.The branch of chemistry in which the compositions of materials are identified is known asa.biochemistry.anic chemistry.c.physical chemistry.d.analytical chemistry.3.Which of these is an example of an extensive property?a.massb.densityc.colord.boiling point4.Which of these is an example of an element?a.sugarb.soilc.waterd.oxygen5.Which of these is an example of a heterogeneous mixture?a.saltb.nitrogenc.mudd.air6.Which process is a chemical change?a.heating to boilingb.dissolving in alcoholc.burning in aird.slicing into two pieces7.At sea level, water boils at 100°C. This is an example of a(n)a.chemical property.c.physical property.b.extensive property.d.chemical change.8.Every pure chemical compound consists of two or more elements thata.are combined chemically.b.can be separated by a physical change. c. cannot be separated.d. are combined in any proportion*Write the correct term (or terms) in the space provided:9.The two properties that all matter has in common are _______________.10.In the periodic table, elements in the vertical columns together form a(n) _______________.11.A mixture that has the same proportion of components throughout is considered to be _______________.12.The substances that are formed by a chemical change are called the _______________.13._______________ are elements that are good conductors of electricity.14.The state of matter in which a material has a definite volume and a definite shape is the _______________.15.Elements are arranged in the periodic table according to their _______________.16.The smallest unit of an element that has the properties of that element is a(n) _______________.17.When atoms of two or more elements are chemically bonded, the substance formed is a(n) _______________.18.If testing shows an element is a poor conductor of electricity, it is probably a(n) _______________.19.A blend of two or more kinds of matter, each of which retains its own identity and properties, is a(n) _______________.20.If a material is tested and every sample has exactly the same properties and the same composition, it is a(n) _______________.21._______________ research is carried out for the sake of increasing knowledge.22.A(n) _______________ is an element that has some characteristics of metals and some characteristics of nonmetals.*For each of the following chemical reactions, identify the reactants and the products:23.carbon + oxygen carbon dioxidereactant(s):______________product(s): ______________24.mercury(II) oxide mercury + oxygenreactant(s): ______________product(s): ______________*Classify each of the following as either a physical change or a chemical change:25. melting an ice cube26. burning a piece of paper27. slicing a loaf of bread28. sharpening a pencil29. decomposing mercury(II) oxide30. dissolving sugar in water*Write the answers to the following questions in the space provided:31.Explain the differences between solid, liquid, and gaseous states in terms of the arrangement of the particles.32.Contrast mixtures and pure substances.33.State the law of conservation of energy.34.Contrast heterogeneous and homogeneous mixtures.35.How could you prove that water is a compound and not an element?*On the line at the left of each statement, write the letter of the choice that best completes the statement :1.The behavior of cathode rays in a glass tube containing gas at low pressure led scientists to conclude that the rays are composed ofa.energy.b.positive particles.c.negative particles.d.neutral particles.2.The basic principles of atomic theory were first conceived bya.Avogadro.b.Bohr.c.Dalton.d.Rutherford.3.The law of multiple proportions is demonstrated by the compoundsa.FeCl3 and Fe(SO4)3.b.O2 and O3.c.CO and CO2.d.FeCl2 and Fe(NO3)2.4.Neutral atoms of the same element can differ ina.chemical properties.b.mass number.c.atomic number.d.number of protons and electrons.5.Dalton’s atomic theory helped to explain the law of conservation of mass because it stated that atomsa.cannot combine.b.are indivisible.c.all have the same mass.d.cannot be created or destroyed.6.Millikan’s experiments led to the determinationa.that the electron carries no charge.b.of the electron’s positive charge.c.of the approximate value of the electron’s mass.d.that the electron has no mass.7.The discovery of the nucleus was a result of Rutherford’s observation that a small percentage of the positively charged particles bombarding the metal’s surfacea.were slightly deflected as they passed through the metal.b.were deflected back toward the source.c.passed straight through the metal.bined with the metal.8.Most of the volume of an atom is occupied by thea.nucleus.b.nuclides.c.electrons.d.protons.*Write the correct term (or terms) in the space provided:9.If a particular compound is composed of elements A and B, the ratio of the mass of B to the mass of A will always be the same. This is a statement of the law of ____________________________.10.The amount of a substance that contains a number of particles equal to the number of atoms in exactly 12 g of carbon-12 is referred to as a(n) ____________________________.11.Because any metal cathode used in a cathode-ray tube produces the same charged particles, it was concluded that all atoms contain ____________________________.12.The smallest particle of an element that retains the chemical properties of that element is a(n) ____________________________.13.Atoms of one element that have different masses are called ____________________________.14.The total number of protons and neutrons in the nucleus of an isotope is called its ____________________________ number.15.The short-range attractive forces that hold the nuclear particles together are called ____________________________.16.The number of protons in the nucleus of an element is called its ____________________________ number.17.If two or more compounds are composed of elements A and B, the ratio of the masses of B combined with 1 g of A is always a ratio of small whole numbers. This is a statement of the law of____________________________.18.Dalton’s theory agreed with the modern atomic theory in almost all cases. List the two statements that were later found to be in error.*Complete the following table to compare the types of subatomic particles:ParticleMass numberRelative chargeLocation26098576200019.Proton260985127000020.Neutron266700-44450021.Electron _ ................
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