File - Mr Weng`s IB Chemistry
... by selectively attaching molecules to specific surfaces. Self-assembly can also occur spontaneously in solution. • Possible methods of producing nanotubes are arc discharge, chemical vapour deposition (CVD) and high pressure carbon monoxide (HIPCO). • Arc discharge involves either vaporizing the sur ...
... by selectively attaching molecules to specific surfaces. Self-assembly can also occur spontaneously in solution. • Possible methods of producing nanotubes are arc discharge, chemical vapour deposition (CVD) and high pressure carbon monoxide (HIPCO). • Arc discharge involves either vaporizing the sur ...
Chapter 3 Chemical Compounds
... (a) The name for P4S7 is tetraphosphorus heptasulfide. The ‘tetra-’ tells you there are 4 P atoms, and the ‘hepta-’ tells you there are 7 S atoms (sulfide is named by dropping ‘-ur’ and replacing it with ‘-ide’). (b) The name for SeF6 is selenium hexafluoride. The prefix ‘mono-’ is almost always omi ...
... (a) The name for P4S7 is tetraphosphorus heptasulfide. The ‘tetra-’ tells you there are 4 P atoms, and the ‘hepta-’ tells you there are 7 S atoms (sulfide is named by dropping ‘-ur’ and replacing it with ‘-ide’). (b) The name for SeF6 is selenium hexafluoride. The prefix ‘mono-’ is almost always omi ...
lecture 6
... with only a small amount of cubic ice Ic Ice rules: two H atoms near each O atom, one H atom on each O …O bond, H-O-H angle little less than the tetrahedral angle (109.47°), at about 107°. Cohesive energy 0.58eV; lattice constant 2.75Å ...
... with only a small amount of cubic ice Ic Ice rules: two H atoms near each O atom, one H atom on each O …O bond, H-O-H angle little less than the tetrahedral angle (109.47°), at about 107°. Cohesive energy 0.58eV; lattice constant 2.75Å ...
Mixtures, Pure Substance and Isotopes
... • How many protons, neutrons, and electrons does this isotope of nitrogen have? Protons: Neutrons: Electrons: ...
... • How many protons, neutrons, and electrons does this isotope of nitrogen have? Protons: Neutrons: Electrons: ...
Lecture 10 Activity of chemical components
... Activity can be thought of as a measure of an effective concentration in solution. Thus, if the solute has tendency to associate in solution then it’s effective concentration would be lower leading to activity coefficient that is less than unity. Similar situation arises with ionic species. Consider ...
... Activity can be thought of as a measure of an effective concentration in solution. Thus, if the solute has tendency to associate in solution then it’s effective concentration would be lower leading to activity coefficient that is less than unity. Similar situation arises with ionic species. Consider ...
Chem EOC Review Cumulative Free Response
... 61) Which type of bonding occurs between 2 nonmetals? 62) Which type of bond results in ions surrounded by a shared “sea” of mobile electrons? 63) What type of bond results between 2 atoms with a big difference in electronegativity? (>1.7) 64) What type of bond results between a metal and a nonmetal ...
... 61) Which type of bonding occurs between 2 nonmetals? 62) Which type of bond results in ions surrounded by a shared “sea” of mobile electrons? 63) What type of bond results between 2 atoms with a big difference in electronegativity? (>1.7) 64) What type of bond results between a metal and a nonmetal ...
Practice Exam-Final Fall 2016 W-Ans
... 22. In the reaction of Al(OH)3 with H2SO4, how many moles of water can be produced If the reaction is begun with 5.500 mole of Al(OH)3? ...
... 22. In the reaction of Al(OH)3 with H2SO4, how many moles of water can be produced If the reaction is begun with 5.500 mole of Al(OH)3? ...
File
... Sub-levels contain a fixed number of orbitals, regions of space where there is a high probability of finding an electron Each orbital has a defined energy state for a given electron configuration and chemical environment and can hold two electrons of opposite spin Description of the relationship bet ...
... Sub-levels contain a fixed number of orbitals, regions of space where there is a high probability of finding an electron Each orbital has a defined energy state for a given electron configuration and chemical environment and can hold two electrons of opposite spin Description of the relationship bet ...
Answers - U of L Class Index
... Why would BeCl2 be a molecular compound when all of the other alkaline earth metals react with chlorine gas to give ionic compounds? [2 marks] The Be2+ cation is very small. Therefore, its charge density is much higher than any other M2+ cation formed from an alkaline earth metal. This makes Be2+ a ...
... Why would BeCl2 be a molecular compound when all of the other alkaline earth metals react with chlorine gas to give ionic compounds? [2 marks] The Be2+ cation is very small. Therefore, its charge density is much higher than any other M2+ cation formed from an alkaline earth metal. This makes Be2+ a ...
Metal
... elements; elements at the horizontal extremities of the periodic table. ● a metallic atom easily gives up its valence electrons to the nonmetallic atoms. ● In the process all the atoms acquire stable configurations and become ions. ● Ionic bonding is non-directional (magnitude of the bond is equal i ...
... elements; elements at the horizontal extremities of the periodic table. ● a metallic atom easily gives up its valence electrons to the nonmetallic atoms. ● In the process all the atoms acquire stable configurations and become ions. ● Ionic bonding is non-directional (magnitude of the bond is equal i ...
Molecular Geometry and Chemical Bonding Theory
... Mulliken). The molecular orbital theory does a better job of describing molecules in their ...
... Mulliken). The molecular orbital theory does a better job of describing molecules in their ...
Chem A Naming Polyatomic Ions Name: Hour: ______ Page 1
... compound we named was an ionic compound. Ionic compounds are made of a metal and a nonmetal. The second type of compound we named was a covalent compound. Covalent compounds are made of two nonmetals. In this packet we will learned how to name compounds with more than two elements. In all the exampl ...
... compound we named was an ionic compound. Ionic compounds are made of a metal and a nonmetal. The second type of compound we named was a covalent compound. Covalent compounds are made of two nonmetals. In this packet we will learned how to name compounds with more than two elements. In all the exampl ...
GCE Chemistry Question Paper Unit 05 - Energetics, Redox
... Use the graph to calculate a value for the slope (gradient) of the line. Give the units of this slope and the symbol for the thermodynamic quantity that this slope represents. Value of the slope ......................................................................................................... ...
... Use the graph to calculate a value for the slope (gradient) of the line. Give the units of this slope and the symbol for the thermodynamic quantity that this slope represents. Value of the slope ......................................................................................................... ...
Chapter 4 Reactions in Aqueous Solutions
... Gravimetric Analysis – One form: isolation of a precipitate – Typical steps: • Determine mass of unknown solid • Dissolve unknown in water • Combine with excess amount of known substance to form a precipitate (excess drives reaction to completion) • Filter, dry and weigh the precipitate • Use formul ...
... Gravimetric Analysis – One form: isolation of a precipitate – Typical steps: • Determine mass of unknown solid • Dissolve unknown in water • Combine with excess amount of known substance to form a precipitate (excess drives reaction to completion) • Filter, dry and weigh the precipitate • Use formul ...
Chemistry in Biology
... B.Types of Chemical Bonds 1. Covalent bond—forms when atoms share one or more pairs of electrons •A molecule is a compound in which the atoms are held together by covalent bonds. •Can be a single, double, or triple bond depending on number of pairs of electrons shared. ...
... B.Types of Chemical Bonds 1. Covalent bond—forms when atoms share one or more pairs of electrons •A molecule is a compound in which the atoms are held together by covalent bonds. •Can be a single, double, or triple bond depending on number of pairs of electrons shared. ...
An Overview of the Zeta Potential
... from electrolyte solution charge arises through the process 4. Differential ion dissolution of unequal adsorption of oppofrom a crystal lattice sitely charged ions and may re5. Surface anisotropy sult in either a net positive or net 6. Isomorphous substitution negative surface. Many lyophobic mat ...
... from electrolyte solution charge arises through the process 4. Differential ion dissolution of unequal adsorption of oppofrom a crystal lattice sitely charged ions and may re5. Surface anisotropy sult in either a net positive or net 6. Isomorphous substitution negative surface. Many lyophobic mat ...
PHYSICAL SETTING CHEMISTRY
... Directions (66–85): Record your answers in the spaces provided in your answer booklet. Some questions may require the use of the 2011 Edition Reference Tables for Physical Setting/Chemistry. Base your answers to questions 66 through 68 on the information below. John Dalton, an early scientist, sketc ...
... Directions (66–85): Record your answers in the spaces provided in your answer booklet. Some questions may require the use of the 2011 Edition Reference Tables for Physical Setting/Chemistry. Base your answers to questions 66 through 68 on the information below. John Dalton, an early scientist, sketc ...
r - Purdue Physics
... •Atoms are made up with a central nucleus of protons and neutrons surrounded by a number of electrons equal to the number of protons. • The notation we use is 2He4 •2 is the atomic number = number of protons (and electrons) •4 is the mass number = number of protons + neutrons •Note atomic mass is th ...
... •Atoms are made up with a central nucleus of protons and neutrons surrounded by a number of electrons equal to the number of protons. • The notation we use is 2He4 •2 is the atomic number = number of protons (and electrons) •4 is the mass number = number of protons + neutrons •Note atomic mass is th ...
112 ex i lec outline
... H. The Wave Behavior of Electrons In 1925 Louis de Broglie suggested that the electron in its circular path around the nucleus had wave properties with particular wavelengths. He went on to propose that the wavelength of the electron depends on its mass and velocity. De Broglied used the term “matt ...
... H. The Wave Behavior of Electrons In 1925 Louis de Broglie suggested that the electron in its circular path around the nucleus had wave properties with particular wavelengths. He went on to propose that the wavelength of the electron depends on its mass and velocity. De Broglied used the term “matt ...
Atoms, compounds and elements - Mrs. Tes de Luna`s Science Class
... ◦ The first part of his theory states that all matter is made of atoms, which are indivisible. ◦ The second part of the theory says all atoms of a given element are identical in mass and properties. ◦ The third part says compounds are combinations of two or more different types of atoms. ◦ The fourt ...
... ◦ The first part of his theory states that all matter is made of atoms, which are indivisible. ◦ The second part of the theory says all atoms of a given element are identical in mass and properties. ◦ The third part says compounds are combinations of two or more different types of atoms. ◦ The fourt ...
Chapter 3 – part I Sections 1-3
... • Must have one chemical oxidized AND another reduced. Can’t have one w/o the other. • What is oxidized and reduced are always reactants, the products are the result of the redox. • So if asked “what is ox or red?”, answer is reactant ...
... • Must have one chemical oxidized AND another reduced. Can’t have one w/o the other. • What is oxidized and reduced are always reactants, the products are the result of the redox. • So if asked “what is ox or red?”, answer is reactant ...