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L Score Name Practice Exam: Paper 1 Topic 3: Periodicity SL 1 135 Atomic number Electronegativity Atomic radius First ionization energy Which property increases down group 1? First ionization energy Melting point Reactivity Electronegativity Which statement about the elements in group 7 is correct? A. Br, will oxidize Cl’. B. F, has the least tendency to be reduced. Cl, will oxidize I. I, is a stronger oxidizing agent than F. Which change explains why the boiling points of the halogens increase as their molecular masses increase? The intermolecular attraction due to temporarily induced dipoles increases. The gravitational attraction between molecules increases. A. B Cc The polarity of the bond within the molecule increases. D. The strength of the bond within the molecule increases. Which pair of elements has the greatest difference in electronegativity? A Cs and F B. Cs and Cl Cc Cs and Br D. Cs and I Which statements about the periodic table are correct? I. Elements in period 3 have similar chemical properties. IL Elements in group 7 show a gradual change in physical properties. TI. The position of an element in period 3 is related to the number of electrons in the highest occupied energy level. A. Tand II only B. Tand III only Cc Tl and III only D. I, Hand II Which statements about period 3 are correct? I. The electronegativity of the elements increases across period 3. IL The atomic radii of the elements decreases across period 3. TI. The oxides of the elements change from acidic to basic across period 3. Tand II only Tand III only IL and III only po FP > I, Hand III Which property decreases down group 7 in the periodic table? Melting point A. B. Electronegativity c Atomic radius D. Tonic radius 13. 14. 15. The x-axis of the graph below represents the atomic number of the elements in period 3. y Which variable could represent the y-axis? A. Melting point Electronegativity B Cc. Tonic radius D. Atomic radius Atomuc number How many protons, neutrons and electrons are present in each atom of *'P? Protons Neutrons Electrons A. 16 15 16 B. 15 16 15 Cc. 15 31 15 D. 16 31 16 An element is in group 4 and period 3 of the periodic table. How many electrons are in the highest occupied energy level of an atom of this element? A 3 B 4 Gc 12 Dd «14 16. Which is the best definition of electronegativity? A. B. Cc D. Electronegativity is the energy required for a gaseous atom to gain an electron. Electronegativity is the attraction of an atom for a bonding pair of electrons. Electronegativity is the attraction between the nucleus and the valence electrons of an atom. Electronegativity is the ability of an atom to attract electrons from another atom. 17. Which statement describes the trends of electronegativity values in the periodic table? Values increase from left to right across a period and increase down a group. Values increase from left to right across a period and decrease down a group. Values decrease from left to right across a period and increase down a group. pO FP > Values decrease from left to right across a period and decrease down a group. 18. Which statement is correct for all elements in the same period? They have the same number of electrons in the highest occupied energy level. They have the same chemical reactivity. They have the same number of occupied energy levels. po FP > They have the same number of neutrons. 19. Which equation best represents the first ionization energy of magnesium? A. Mg(s) > Mg*(s) +e Cc. Mg(g) > Mg*(g) +e B. — Mg(g) > Mg?*(g) + 2e~ D. — Mg(s) > Mg*(g) + e~ 20. What happens when sodium is added to water? I. A gas is evolved IL The temperature of the water increases Il. A clear, colourless solution is formed A. Tand II only Cc. ILand III only B. Tand III only Dz. I, and I 500. HL 1. Which electron transitions are responsible for the colours of transition metal compounds? A. B. Cc. Between d orbitals and s orbitals Among the attached ligands From the metal ion to the attached ligands Between d orbitals 2. Ligands can form dative covalent bonds with metal ions to form complex ions. Which of the following can act as a ligand? I cr IL. NH; I. H,O A. Tand II only Cc. ILand III only B. Tand III only Dz. I, and I 3. Which metal nitrate solution is coloured? A. Zn (NO3),(aq) B. Ni (NO3),(aq) C. Mg (NO3)9(aq) D. Sc (NO3)3(aq) 4, Which statements are correct for the complex ion [CuCl,]>-? I The oxidation number of Cu in the complex ion is +2. IL. The coordination number of the copper ion is 4. TIL. Chloride ions are behaving as ligands. A. Tand II only B. Tand III only Cc Tl and III only D. I, Hand II What is the ligand in the complex K3[Fe(CN),]? A. B. c. D. CN" Fe" Kt [Fe(CN),]> In which complexes does iron have an oxidation number of +3? A. B. Cc D. 1. [Fe(H1,0),)°* IL [Fe(H,0),(CN)P* HL [Fe(CN),)- Tand II only Tand III only IL and III only I, Hand III ich statements are correct for the reactio 1,, MgCl, and SiCl, with water? MgCl, SiCl, forms a neutral solution no reaction rms an acidic solution forms an acidic solution no reaction Which transition element, or compound of a transition element, is used as a catalyst in the Contact process? A. B. STPJE]> rms a neutral solution forms an acidic solution Fe MnO, V20s Ni 
