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Ch. 14 Test Review CHEMICAL PERIODICITY COMPLETION decreases increases (3) groups (2) periods transition metals ionization energy atomic # noble gases representative electronegativity The periodic table organizes the elements into vertical ____________ and horizontal ____________ in order of increasing _________________. The table is constructed so that elements that have similar chemical properties are in the same ____________. The elements in Group 1, 2, 13-18 are called the __________________ elements. The ___________________ make up Group 18. The elements in Groups 3-12 are called the ___________________________. Atomic size generally _________________ as you move from left to right in a period. Atomic size generally _________________ down a group because there are more _______________ levels. The energy required to remove an electron from an atom is known as the _______________ energy. This quantity ____________ as you move left to right across a period. The ability of a bonded atom to attract electrons to itself is known as _________________, and this quantity _______________ as we move from left to right across a period. QUESTIONS 1. For the following pairs of atoms, tell which one of each pair has the larger atomic size. a. Al, B a.__________ b. S, O b.__________ c. Br, Cl c.__________ d. Na, Al d.__________ e. O, F e.__________ 2. For the elements of Group 15, tell whether it is a metal, nonmetal, or metalloid. #7 _______________________ #51___________________________ #15 _______________________ #83___________________________ # 33 _______________________ 3. Indicate which element of the following pairs has the greater electronegativity. a. calcium, gallium a.__________________ b. lithium, oxygen b.__________________ c. oxygen, sulfur c.__________________ d. bromine, arsenic d.__________________ 4. Indicate which element in the following pairs has the lowest ionization energy. a. boron, carbon a. _____________________ b. magnesium, calcium b. _____________________ c. sulfur, oxygen c. _____________________ d. sodium, silicon d.______________________ 5. Name the halogen in the 4th period: ______________. Name the alkali metal in the 6th period _______________. Name the noble gas in the 3rd period ____________________. 6. Circle each ion that becomes larger than the atom from which it came. a. K+ b. O-2 c. Ba+2 d. Al+3
