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Buckyballs et al Molecular Shapes $200 $200 $400 $400 $600 VESPR Model Pi and Sigma Periodic Table Potpourri $200 $200 $200 $200 $400 $400 $400 $400 $600 $600 $600 $600 $600 $800 $800 $800 $800 $800 $800 $1000 $1000 $1000 $1000 $1000 $1000 The Atom Bonding Reactions Matter Math of Chemistry Solubility $400 $400 $400 $400 $400 $400 $800 $800 $800 $800 $800 $800 $1200 $1200 $1200 $1200 $1200 $1200 $1600 $1600 $1600 $1600 $1600 $1600 $2000 $2000 $2000 $2000 $2000 $2000 Final Jeopardy Final Jeopardy Semester 1 Knowledge Final Jeopardy Ionic Polar Covalent Pure Covalent X > 1.7 1.7 X .5 X < .5 Write down the 3 divisions and numbers that you must use after you subtract the Electronegativity numbers between 2 atoms in a $200 Properties of the elements that repeat consistently across the periods, determined by electron configuration What is the definition of Periodic Properties? $400 Amount of pull the valence electrons feel from protons in the nucleus What is the effective Nuclear Charge (Z)? $600 Stays the same The effective nuclear charge trend for going down a family… $800 Goes up, because protons increase while shielding electrons stays the same Going across a period, the effective nuclear charge... $1000 Atomic size What is the size of an atom called? $200 Effective nuclear charge and energy levels What are factors which affect the size of an atom and how they affect it ? $400 Increases due to the adding of more energy levels Trend of atomic size going down a family… $600 Trend of atomic size going across a period What Decreases due to energy level staying the same, while effective nuclear charge increases (more pull on valence electrons)? $800 Ionization Energy What is the energy needed to move an electron? $1000 The effective nuclear charge and atom size What are factors which affect ionization energy and how they affect it ? $200 Trend of ionization energy going down a family What decreases (easier to remove) because size is bigger, so valence electrons are further away ? $400 Trend of ionization energy going across a period What increases (harder to remove) due to effective nuclear charge increasing (more pull - more likely to attract electrons) ? $600 Electronegativity What energy is needed to add an electron (likeliness to gain)? $800 effective nuclear charge and atom size What factors which affect electronegativity and how they affect it ? $1000 Decreases.. if size is bigger, less pull from nucleus •What is the trend of electronegativity going down a family $200 Increases due to effective nuclear charge being greater Trend of electronegativity going across a period $400 Ionic Size Size of an ion $600 to organize elements in meaningful way Why was periodic table developed? $800 Mendeleev - increasing molar mass, while today’s is increasing atomic number How was Medeleevs scheme for listing elements different from that used in the modern periodic table? $1000 elements in same group have same number of valence electrons What relationship can be seen between an elements placement within a group and its electron configuration? $200 Noble gases had not been discovered yet due to their inactivity Why did Group 8 not appear on the Mendeleev periodic table? $400 increasing tendency to form neg ions therefore use less energy (minus -: Exothermic Trend of electron affinity across left to right $600 farther from nucleus therefore uses less energy to add an electron also shielding can add electrons Trend of electron affinity down top to bottom $800 X + e− → X− Equation electron affinity $1000 M(g) + hn ® M+ + e-. Equation for ionization energy $200 both negative ions (right side) give off energy to gain an electron + ions use energy Electron affinity energy can be what: + or -? $400 1) shielding 2) Effective (Strong) nuclear charge 3) add another orbit of electrons increases distance from nucleus Name 3 concepts that can affect periodicity $600 Protons and neutrons in element 114 What exactly do these two pictures represent and where are the from? $800 The equal the levels from the nucleus out. How do the periods on the periodic table relate to the electron orbitals and the nucleus. $1000 1s2 2s2 2p6 3s2 3p2 and [Ne] 3s2 3p2 Long and short electron configuration for silicon. Daily Double Dalton, Thompson, Rutherford and Bohr…Schrödinger, and Heisenberg st 1 Name the five scientists in “The Atom Song The Jeopardy champion!