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Periodic Table Review Question 1: Who stated the principle of Periodic Law? Answer 1: Mendeleev Question 2: What is periodic Law? Answer 2: When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties. Question 3: What are Valence Electrons? Answer 3: Electrons in the outermost energy level Question 4: Elements with the same number of valence have similar ____________________. Answer 4: Properties Question 5: What are the vertical columns called? Answer 5: Groups Question 6: What are the horizontal rows called? Answer 6: Periods Question 7: What group numbers are the main group metals? Answer 7: Groups 1 and 2 Question 8: What are the main group elements sometimes referred to as? Answer 8: Representative elements Question 9: What group number are the alkali metals? Answer 9: Group 1 Question 10: What group number are the alkaline earth metals? Answer 10: Group 2 Question 11: What group number are the halogens? Answer 11: Group 17 Question 12: What group number are the noble gases? Answer 12: Group 18 Question 13: What elements are the alkali metals? Answer 13: Lithium Sodium Potassium Rubidium Cesium Francium Question 14: What elements are the alkaline earth metals? Answer 14: Beryllium Magnesium Calcium Strontium Barium Radium Question 15: What elements are the halogens? Answer 15: Fluorine Chlorine Bromine Iodine Astatine Question 16: What elements are the noble gases? Answer 16: Helium Neon Argon Krypton Xenon Radon Question 17: How many valence electrons do alkali metals have? Answer 17: 1 valence electron Question 18: Why can the alkali metals not be found alone? Answer 18: Because they are so reactive Question 19: How many valance electrons do alkaline earth metals have? Answer 19: 2 valence electrons Question 20: Are halogens metals or nonmetals? Answer 20: Nonmetals Question 21: When halogens react with metals what is produced? Answer 21: Salts Question 22: How many valence electrons do the halogens have? Answer 22: 7 valence electrons Question 23: Why do the noble gases not want to react? Answer 23: They have 8 valence electrons They have a full outermost electron shell Question 24: What are the three properties of Metals? Answer 24: Shiny Conductors Malleable Ductile Question 25: What does ductile mean? Answer 25: Can be rolled into a wire Question 26: What does malleable mean? Answer 26: Can be pounded out into sheets Question 27 What group numbers do you find the transition metals? Answer 27: Groups 3-12 Question 28: What are the properties of nonmetals? Answer 28: Dull Nonconductors Brittle Question 29: What are the properties of metalloids? Answer 29: Semiconductors Can be shiny or dull Can be malleable or brittle Question 30: What is Ionizations energy Answer 30: The energy required to remove an electron from an atom. Question 31: What is the trend for ionization energy across a period and down a group? Answer 31: Increases as you move across a period and decreases as you move down a group Question 32: What is atomic radius? Answer 32: Half the distance from center to center of two like atoms that are bonded together. Question 33: What is the trend for atomic radius across a period and down a group? Answer 33: Decreases as you move across a period and increases as you move down a group. Question 34: What is electronegativity? Answer 34: Is a measure of the ability of an atom in a chemical compound to attract electrons. Question 35: What is the trend for electronegativity across a period and down a group? Answer 35: Increases as you move across a period and decreases as you move down a group Question 36: Elements in the same period have the same number of ____________________________________________ _______________________________________. Answer 36: Occupied energy levels Question 37: Elements in the same group have the same number of ____________________________________________ _______________________________________. Question 38 Whose design of the periodic table is this? Answer 38: Mendeleev Question 39: Where are the metals located on the periodic table? Answer 39: To the left of the stair step line. Question 40: Where are the metalloids located on the periodic table? Answer 40: Along the stair step line. Question 41: Where are the nonmetals located on the periodic table? Answer 41: To the right of the stair step line.