PPT - kimscience.com
... Atomic structure- Bohr model Energy level=n Lowest energy state is closest to nucleus-attracted to the protons When one energy level is filled, electrons are found at higher levels. Each energy level can hold a maximum number of electrons (2n2 electrons) First shell = two electrons Second sh ...
... Atomic structure- Bohr model Energy level=n Lowest energy state is closest to nucleus-attracted to the protons When one energy level is filled, electrons are found at higher levels. Each energy level can hold a maximum number of electrons (2n2 electrons) First shell = two electrons Second sh ...
Unit 2 Practice Exam exam_2p_08_matter
... 42. Why do atomic radii increase dramatically with each additional row of the periodic table? a. atomic nuclei become increasingly attractive as more protons are added. b. another energy level is utilized by the electrons. c. the energy required to remove an electron is reduced by shielding of inter ...
... 42. Why do atomic radii increase dramatically with each additional row of the periodic table? a. atomic nuclei become increasingly attractive as more protons are added. b. another energy level is utilized by the electrons. c. the energy required to remove an electron is reduced by shielding of inter ...
Ionic bonding
... NaCl is a 3D array of Na+ and Cl- ions that form a repeating array, aka a crystal. • The size of the crystal depends on the number of salt units. Size can increase! How does NaCl form? Na loses an e-, and that same e- is transferred to Cl. • Both atoms become ions and are oppositely charged: Na+1 & ...
... NaCl is a 3D array of Na+ and Cl- ions that form a repeating array, aka a crystal. • The size of the crystal depends on the number of salt units. Size can increase! How does NaCl form? Na loses an e-, and that same e- is transferred to Cl. • Both atoms become ions and are oppositely charged: Na+1 & ...
Which frequency of light has the most energy
... Refer to the Bohr model of the hydrogen atom in the chemistry state reference tables Which electron transition would result in emission of ultraviolet radiation? A. Level 4 to level 1 C. Level 5 to level 2 B. Level 4 to level 3 D. Level 3 to level 2 ...
... Refer to the Bohr model of the hydrogen atom in the chemistry state reference tables Which electron transition would result in emission of ultraviolet radiation? A. Level 4 to level 1 C. Level 5 to level 2 B. Level 4 to level 3 D. Level 3 to level 2 ...
2. NH3 - Huffman Chemistry Website!
... Which groups of elements on the periodic table are cations and which group of elements are anions? Note the charges of each group on the chart below. Draw in the line separating the metals from the nonmetals. ...
... Which groups of elements on the periodic table are cations and which group of elements are anions? Note the charges of each group on the chart below. Draw in the line separating the metals from the nonmetals. ...
Synthesis of a New Structure B2H4 from B2H6 Highly Selective
... B BH4, 10B11BH4 and 11B11BH4 were observed. To confirm the structure of the new species, neutral B2H4, Cheng replaced the hydrogen atoms with deuterium atoms. Both the absorption spectra and the calculated vibrational energies of B2D4 conform to the calculated structure shown in Fig. 2. On that basi ...
... B BH4, 10B11BH4 and 11B11BH4 were observed. To confirm the structure of the new species, neutral B2H4, Cheng replaced the hydrogen atoms with deuterium atoms. Both the absorption spectra and the calculated vibrational energies of B2D4 conform to the calculated structure shown in Fig. 2. On that basi ...
Atoms and Spectra Chapter 7 Guidepost
... • Next: Helium (He), with 2 protons (and 2 neutrons + 2 el.). ...
... • Next: Helium (He), with 2 protons (and 2 neutrons + 2 el.). ...
Chemistry Major Understandings
... 3.3d The empirical formula of a compound is the simplest whole-number ratio of atoms of the elements in a compound. It may be different from the molecular formula, which is the actual ratio of atoms in a molecule of that compound. 3.3e The formula mass of a substance is the sum of the atomic masses ...
... 3.3d The empirical formula of a compound is the simplest whole-number ratio of atoms of the elements in a compound. It may be different from the molecular formula, which is the actual ratio of atoms in a molecule of that compound. 3.3e The formula mass of a substance is the sum of the atomic masses ...
Ionic Bonding
... This amount of energy can compensate for values as large as I3 for valence electrons (i.e. can strip away up to 3 electrons). Because most transition metals would require the removal of more than 3 electrons to attain a noble gas core, they are not found in ionic compounds with a noble gas core (thu ...
... This amount of energy can compensate for values as large as I3 for valence electrons (i.e. can strip away up to 3 electrons). Because most transition metals would require the removal of more than 3 electrons to attain a noble gas core, they are not found in ionic compounds with a noble gas core (thu ...
Practice Exam 3 - University of Missouri
... 7. The thermochemical equation which defines the enthalpy of formation of acetylene, C2H2(g) is a. 2 C(s) + H2(g) → C2H2(g) b. 2 C(g) + 2H(g) → C2H2(g) c. 2 C2(g) + 2H(g) → C2H2(g) d. C2H6(g) → C2H2(g) + H2 e. none of the above 8. Which of the following has a standard molar enthalpy of formation of ...
... 7. The thermochemical equation which defines the enthalpy of formation of acetylene, C2H2(g) is a. 2 C(s) + H2(g) → C2H2(g) b. 2 C(g) + 2H(g) → C2H2(g) c. 2 C2(g) + 2H(g) → C2H2(g) d. C2H6(g) → C2H2(g) + H2 e. none of the above 8. Which of the following has a standard molar enthalpy of formation of ...
Chemistry Midterm Review Study Guide 2012
... e. An atom or group of atoms that has a positive or negative charge is called a(n) cation 6. Explain which of the elements in each pair has the larger ionization energy and WHY. a.Mg or Cl they have the same number of energy levels of electrons, Cl has a greater nuclear charge with more protons in i ...
... e. An atom or group of atoms that has a positive or negative charge is called a(n) cation 6. Explain which of the elements in each pair has the larger ionization energy and WHY. a.Mg or Cl they have the same number of energy levels of electrons, Cl has a greater nuclear charge with more protons in i ...
1. Review (MC problems, due Monday) 2. - mvhs
... 3. A solution of barium hydroxide is titrated with 0.1-M sulfuric acid and the electrical conductivity of the solution is measured as the titration proceeds. a) For the reaction that occurs during the titration described above, write a balanced net ionic equation. (b) Explain why the conductivity de ...
... 3. A solution of barium hydroxide is titrated with 0.1-M sulfuric acid and the electrical conductivity of the solution is measured as the titration proceeds. a) For the reaction that occurs during the titration described above, write a balanced net ionic equation. (b) Explain why the conductivity de ...
Bonding - Graham ISD
... because compounds of these atoms are almost always less stable than the original atom. Atoms with a partially stable outer energy level can lose, gain, or share electrons to obtain a stable outer energy level. ...
... because compounds of these atoms are almost always less stable than the original atom. Atoms with a partially stable outer energy level can lose, gain, or share electrons to obtain a stable outer energy level. ...
3rd Quarter Test
... a) a polar covalent bond with an electronegativity difference of zero b) a polar covalent bond with an electronegativity difference between zero and 1.7 c) a non-polar covalent bond with an electronegativity difference of zero d) a non-polar covalent bond with an electronegativity difference between ...
... a) a polar covalent bond with an electronegativity difference of zero b) a polar covalent bond with an electronegativity difference between zero and 1.7 c) a non-polar covalent bond with an electronegativity difference of zero d) a non-polar covalent bond with an electronegativity difference between ...
AP Chemistry
... (1) Cations are smaller than their parent atoms. (a) Why? Farthest-out occupied orbitals are emptied, and there are fewer electron-electron repulsions. (2) Anions are larger than their parent atoms. (a) Why? More electrons, so more electron-electron repulsions, so electrons spread out more in space. ...
... (1) Cations are smaller than their parent atoms. (a) Why? Farthest-out occupied orbitals are emptied, and there are fewer electron-electron repulsions. (2) Anions are larger than their parent atoms. (a) Why? More electrons, so more electron-electron repulsions, so electrons spread out more in space. ...
Chapter 4 Notes - Atomic Theory
... Ions: Atoms that gain and lose electrons to become stable (full valence shells). 1. Cations: metals that lose electrons & form positive ions (Na+) Multivalent: Some metals can have more than one charge (Fe2+ or Fe3+). 2. Anions: Non-metals gain electrons & form negative ions (O-2) ...
... Ions: Atoms that gain and lose electrons to become stable (full valence shells). 1. Cations: metals that lose electrons & form positive ions (Na+) Multivalent: Some metals can have more than one charge (Fe2+ or Fe3+). 2. Anions: Non-metals gain electrons & form negative ions (O-2) ...
9th GRADE CHEMISTRY FINAL STUDY GUIDE
... Isotope – different atoms of the same element may have different numbers of neutrons (protons, however, will ALWAYS be the same). Ion – at atom that has gained or lost electrons and now has an electrical charge. ...
... Isotope – different atoms of the same element may have different numbers of neutrons (protons, however, will ALWAYS be the same). Ion – at atom that has gained or lost electrons and now has an electrical charge. ...
Metastable inner-shell molecular state
Metastable Innershell Molecular State (MIMS) is a class of ultra-high-energy short-lived molecules have the binding energy up to 1,000 times larger and bond length up to 100 times smaller than typical molecules. MIMS is formed by inner-shell electrons that are normally resistant to molecular formation. However, in stellar conditions, the inner-shell electrons become reactive to form molecular structures (MIMS) from combinations of all elements in the periodic table. MIMS upon dissociation can emit x-ray photons with energies up to 100 keV at extremely high conversion efficiencies from compression energy to photon energy. MIMS is predicted to exist and dominate radiation processes in extreme astrophysical environments, such as large planet cores, star interiors, and black hole and neutron star surroundings. There, MIMS is predicted to enable highly energy-efficient transformation of the stellar compression energy into the radiation energy.The right schematic illustration shows the proposed four stages of the K-shell MIMS (K-MIMS) formation and x-ray generation process. Stage I: Individual atoms are subjected to the stellar compression and ready for absorbing the compression energy. Stage II: The outer electron shells fuse together under increasing ""stellar"" pressure. Stage III: At the peak pressure, via pressure ionization K-shell orbits form the K-MIMS, which is vibrationally hot and encapsulated by a Rydberg-like pseudo-L-Shell structure. Stage IV: The K-MIMS cools down by ionizing (""boiling-off"") a number of pseudo-L-shell electrons and subsequent optical decay by emitting an x-ray photon. The dissociated atoms return their original atoms states and are ready for absorbing the compression energy.MIMS also can be readily produced in laboratory and industrial environments, such as hypervelocity particle impact, laser fusion and z-machine. MIMS can be exploited for highly energy-efficient production of high intensity x-ray beams for a wide range of innovative applications, such as photolithography, x-ray lasers, and inertial fusion.