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Review

Review. Periodicity………. NOBLE GASES. ALKALINE EARTH. ALKALINE. HALOGENS. TRANSITION ELEMENTS. LANTHANIDE SERIES. ACTINIDE SERIES. How properties are linked to the size of the atom. Smaller the atom……. Electrons are closer to the nucleus…. Nuclear hold is strong….

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Review

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  1. Review Periodicity………..

  2. NOBLE GASES ALKALINE EARTH ALKALINE HALOGENS TRANSITION ELEMENTS LANTHANIDE SERIES ACTINIDE SERIES

  3. How properties are linked to the size of the atom.. Smaller the atom…….. Electrons are closer to the nucleus…. Nuclear hold is strong…. Difficult to remove electrons from it, so Ionization Energy is high… Easy to add electrons to it, so Electronegativity is high… They are better Non Metal but poor Metals

  4. How properties are linked to the size of the atom.. Larger the atom…….. Electrons are far from the nucleus…. Nuclear hold is weak…. Easy to remove electrons from it, so Ionization Energy is low… Difficult to add electrons to it, so Electronegativity is low… They are better Metal but poor Non metals

  5. Atomic size (Radius) I N C R E A S I N G D…E…C…R…E…A…S…I…N…G

  6. Ionization Energy D E C R E A S I N G I…N…C…R…E…A…S…I…N…G

  7. Electronegativity D E C R E A S I N G I…N…C…R…E…A…S…I…N…G

  8. Metallic Character I N C R E A S I N G D…E…C…R…E…A…S…I…N…G

  9. Non-Metallic Character D E C R E A S I N G I…N…C…R…E…A…S…I…N…G

  10. Review • The number of valence electrons in Gr IIIA elements are…………… Ans: 3 • There are few electrons in the valence energy level of _________ and they are ___________held. • (Metals/Nonmetals) (weakly/strongly) Ans: Metals/weakly • Metals tend to _______electrons whereas Nonmetals tend to _______ electrons. Ans: lose/gain

  11. Review….. • The special name of • (i) Gr I A • (ii) Gr II A • (iii) Gr VII A • (iv) Gr VIII A • (v) d block elements • (vi) 4f block elements • (vii) 5f block elements Ans: Alkali Ans: Alkaline earth Ans: Halogens Ans: Noble gas Ans: Transition Metals Ans: Lanthanide series Ans: Actinide series

  12. Review……. • Give one element that resembles most to “N” in phy. & Chem. Properties . Ans: P, AS, Se • The # of valence electrons of elements with E.C 3S2,3p5 Ans: 7 • What charge do the following group elements form? • Gr IA , Gr VA, Gr VIIA Ans: +1, -3, -1 • What charge do the following elements carry? • Ba , Al, P, O , Cu Ans: +2, +3, -3, -2, +2

  13. Review……. • The tendency of an atom attracting electrons is called……… Ans: Electronegativity • Which element has the Highest E.N.? • Rb, I , In, Sr Ans: I 11. Which element has the Lowest E.N.? As, Sb, N, P Ans: Sb • The nonmetal that is a liquid at room temperature… Ans: Br

  14. Review………….. • A Metal that is a liquid at room temperature… Ans: Hg • Name an element that is a gas room temperature and become -1 charge? Ans: F or Cl • The energy required to remove an electron from an atom is called……… Ans: Ionization energy 15. Which element has the least Ionization Energy? P, Mg, S, Cl Ans: Mg

  15. Review…….. 16. Which element has the most Ionization Energy? Te, S, O, Se Ans: O • The vertical columns is called a ________ whereas the horizontal row is called a __________. Ans: Group/family : period/series • Which element has the largest size? • Be , Ca, As, Br Ans: Ca • Which element is most reactive? • N, F, P, Cl Ans: F

  16. Review………. 20. Which element is most reactive? K , Cs, Sc, Ba Ans: Cs • A Cation (positive ion) is __________ than the its atom whereas an anion is __________ than its atom. Ans: smaller/larger • Which one is larger? • Ba or Ba+2 • F or I • O-2 or O Ans: Ba Ans: I Ans: O-2

  17. Review……… • What is the element that has 4p3 as the last piece of electron configuration? Ans: As • From which sublevel the electron is lost when Na becomes Na+1 ion? Ans: 3s • Which elements chemically resembles the most? • Ca, Ge, Se, O Ans: Se & O 26. The elements with the properties of metals and nonmetals are…… Ans: Metalloids

  18. Review…… • The modern periodic law is….. Ans: The Phy. & Che. Properties of elements are periodic functions of their atomic number. • The tendency to lose electrons ___________ when you go down the group. Ans: increases 28. Which of the following elements is the most (i) Metallic and (ii) Nonmetallic? Mn, Rb, Mg, Si, Cl, I, Ge Ans: (i) Rb (ii) Cl

  19. Arrange Ca, Ba, As & Ga in the order of A.S.? 31.Arrange C, O, Li & Cs in the order of I.E? 29. Indicate whether the following elements are solids, liquids or a gases at room temperature? K, Hg, O, Br, Cu

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