Learning Outcomes for CHEM1001 in 2015
... 6. explain what atoms are and how they combine to form compounds 7. appreciate the difference between physical and chemical properties 8. list the particles that make up atoms, their symbols and their relative masses and charges 9. read and write the atomic symbol containing the mass number and atom ...
... 6. explain what atoms are and how they combine to form compounds 7. appreciate the difference between physical and chemical properties 8. list the particles that make up atoms, their symbols and their relative masses and charges 9. read and write the atomic symbol containing the mass number and atom ...
Part IX
... My Personal Opinion • The Tightbinding / LCAO method gives a much clearer physical picture (than the pseudopotential method does) of the causes of the bands & the gaps. • In this method, the periodic potential V is discussed as in terms of an Overlap Interaction of the electrons on neighboring atoms ...
... My Personal Opinion • The Tightbinding / LCAO method gives a much clearer physical picture (than the pseudopotential method does) of the causes of the bands & the gaps. • In this method, the periodic potential V is discussed as in terms of an Overlap Interaction of the electrons on neighboring atoms ...
Name_______________________ Answers to Final Exam Study
... Occurs when large nuclei fuse together. d. All of the above. 16. Which of the following types of radiation has negligible mass and does not change the number of protons or neutrons in an atom’s nucleus? a. ...
... Occurs when large nuclei fuse together. d. All of the above. 16. Which of the following types of radiation has negligible mass and does not change the number of protons or neutrons in an atom’s nucleus? a. ...
Variation in Properties of Group II Compounds
... Variation in Atomic and Ionic radii There is a general increase in atomic and ionic radii on descending group II. The increase in both radii is due to the addition of one more electron shell on going down the group. However the ionic radius is always smaller than the atomic radius. Group II atoms te ...
... Variation in Atomic and Ionic radii There is a general increase in atomic and ionic radii on descending group II. The increase in both radii is due to the addition of one more electron shell on going down the group. However the ionic radius is always smaller than the atomic radius. Group II atoms te ...
Final Exam Practice-2017
... ___ Weak forces between molecules, include surface tension and dipoles. ___ High melting and boiling point, good conductor in solution, soluble, hard, brittle. ___ Very high melting and boiling point, poor conductor, insoluble and extremely hard. 27. Which class of organic compound contains at least ...
... ___ Weak forces between molecules, include surface tension and dipoles. ___ High melting and boiling point, good conductor in solution, soluble, hard, brittle. ___ Very high melting and boiling point, poor conductor, insoluble and extremely hard. 27. Which class of organic compound contains at least ...
Fundamentals of Chemistry
... • The number of electrons in the valence shell determines the relative activity of an element. • The arrangement of electrons in the outer shell explains why some elements are chemically very active, some are not very active, and others are inert. • Group I has 1 valence electron, which makes it eas ...
... • The number of electrons in the valence shell determines the relative activity of an element. • The arrangement of electrons in the outer shell explains why some elements are chemically very active, some are not very active, and others are inert. • Group I has 1 valence electron, which makes it eas ...
Chemistry Final Exam Study Guide_S2014
... State whether the following processes are exothermic or endothermic: a. C2H5OH (l) C2H5OH(g) d. NaCl(s)NaCl(l) b. NH3(g) NH3(l) e. C5H12(g) + O2(g)CO2(g) + H2O(g) c. Br2(l)Br2(s) If the temperature of 34.4g of ethanol increases from 25C to 78.8C, how much heat has been absorbed by the ethanol ...
... State whether the following processes are exothermic or endothermic: a. C2H5OH (l) C2H5OH(g) d. NaCl(s)NaCl(l) b. NH3(g) NH3(l) e. C5H12(g) + O2(g)CO2(g) + H2O(g) c. Br2(l)Br2(s) If the temperature of 34.4g of ethanol increases from 25C to 78.8C, how much heat has been absorbed by the ethanol ...
Ch 2 Atoms, Molecules, and Ions
... - Solid ionic compounds are crystals with a regular 3D arrangement of alternating ions. The crystal contains only ions, and does not contain separate discrete molecules. Its formula unit gives the proportions, but not any structural information. Naming Compounds - Chemical nomenclature is a systemat ...
... - Solid ionic compounds are crystals with a regular 3D arrangement of alternating ions. The crystal contains only ions, and does not contain separate discrete molecules. Its formula unit gives the proportions, but not any structural information. Naming Compounds - Chemical nomenclature is a systemat ...
key concepts of matter
... levels in the electron cloud. There are a certain number of electrons that each energy level can hold. Key Concept 3: Electrons located in the outermost shell of the electron cloud are called “valence electrons” and have the highest energy. Key Concept 4: Valence electrons determine the chemical pro ...
... levels in the electron cloud. There are a certain number of electrons that each energy level can hold. Key Concept 3: Electrons located in the outermost shell of the electron cloud are called “valence electrons” and have the highest energy. Key Concept 4: Valence electrons determine the chemical pro ...
Chemistry - Beachwood City Schools
... 1. What is a chemical bond? Why do atoms form chemical bonds? How are covalent bonds and ionic bonds different? How are they the same? 2. How is the valence of an atom related to the number of bonds it usually forms? 3. What types of substances contain covalent bonds? 4. List the atoms in each of th ...
... 1. What is a chemical bond? Why do atoms form chemical bonds? How are covalent bonds and ionic bonds different? How are they the same? 2. How is the valence of an atom related to the number of bonds it usually forms? 3. What types of substances contain covalent bonds? 4. List the atoms in each of th ...
Key Concept 1: An atom is the smallest unit of an element that
... cloud. There are a certain number of electrons that each energy level can hold. ...
... cloud. There are a certain number of electrons that each energy level can hold. ...
Honors Chemistry - Stout Middle School
... h. Formula unit i. Monatomic ion j. Oxidation number (charge) k. Polyatomic ion l. Electron sea model m. Octet n. Crystal lattice o. Metallic bond p. Lattice energy q. Alloy 2. Know how cations and anions are formed. 3. Know what elements form cations and anions. 4. Be able to predict oxidation numb ...
... h. Formula unit i. Monatomic ion j. Oxidation number (charge) k. Polyatomic ion l. Electron sea model m. Octet n. Crystal lattice o. Metallic bond p. Lattice energy q. Alloy 2. Know how cations and anions are formed. 3. Know what elements form cations and anions. 4. Be able to predict oxidation numb ...
Honors Chemistry
... What are the 3 subatomic particles of the atom? What did Dalton’s Atomic Theory say? What as Thomson’s Plum Pudding Theory? Describe Rutherford’s gold foil experiment. How did it improve on Dalton’s and Thomson’s theories? 5. What is an isotope? 6. How can the number of protons be determined? Neutro ...
... What are the 3 subatomic particles of the atom? What did Dalton’s Atomic Theory say? What as Thomson’s Plum Pudding Theory? Describe Rutherford’s gold foil experiment. How did it improve on Dalton’s and Thomson’s theories? 5. What is an isotope? 6. How can the number of protons be determined? Neutro ...
200 Ways to Pass the Chemistry - Home 15-16
... Which of the following atoms forms a stable ion that does not have an octet structure? Li F Na Cl 95. Covalent bonds non-metal with non-metal form when two atoms share a pair of electrons. How many covalent bonds are found in a nitrogen (N2) molecule? 96. Ionic bonds metal with non-metal form when o ...
... Which of the following atoms forms a stable ion that does not have an octet structure? Li F Na Cl 95. Covalent bonds non-metal with non-metal form when two atoms share a pair of electrons. How many covalent bonds are found in a nitrogen (N2) molecule? 96. Ionic bonds metal with non-metal form when o ...
Chemistry - StudyTime NZ
... Neither Oxygen nor Magnesium have full valence electron shells. Because of this, they must each lose or gain electrons in order to become stable. Oxygen has 8 electrons and hence an electron arrangement ...
... Neither Oxygen nor Magnesium have full valence electron shells. Because of this, they must each lose or gain electrons in order to become stable. Oxygen has 8 electrons and hence an electron arrangement ...
Atoms and Molecules - Gulfport School District
... •Ionic bonds occur between oppositely charged ions and involve a transfer of electrons. •Ionic compounds are extremely strong and solids are high melting points. •Ionic compounds dissociate in water and solutions conduct electricity. Chapter 2 – The Body’s Chemical Makeup ...
... •Ionic bonds occur between oppositely charged ions and involve a transfer of electrons. •Ionic compounds are extremely strong and solids are high melting points. •Ionic compounds dissociate in water and solutions conduct electricity. Chapter 2 – The Body’s Chemical Makeup ...
Review Material
... from left to right across a period. Fluorine is the most electronegative element. ...
... from left to right across a period. Fluorine is the most electronegative element. ...
Chapters 9 and 10
... i. How many sigma bonds and how many pi bonds are in structure 1? ii. Which one of the two structures best represents a molecule of OPF 3? Justify your answer in terms of formal charge. 20. 2005B #8 a-c Use principles of atomic structure, bonding, and intermolecular forces to answer the following qu ...
... i. How many sigma bonds and how many pi bonds are in structure 1? ii. Which one of the two structures best represents a molecule of OPF 3? Justify your answer in terms of formal charge. 20. 2005B #8 a-c Use principles of atomic structure, bonding, and intermolecular forces to answer the following qu ...
1 Jasperse Arrow-Pushing Practice, Page 1: • Draw arrows for each
... Some Arrow-Pushing Guidelines T ...
... Some Arrow-Pushing Guidelines T ...
Final Exam Practice 2016 (MC)
... ___ Weak forces between molecules, include surface tension and dipoles. ___ High melting and boiling point, good conductor in solution, soluble, hard, brittle. ___ Very high melting and boiling point, poor conductor, insoluble and extremely hard. 29. Which class of organic compound contains at least ...
... ___ Weak forces between molecules, include surface tension and dipoles. ___ High melting and boiling point, good conductor in solution, soluble, hard, brittle. ___ Very high melting and boiling point, poor conductor, insoluble and extremely hard. 29. Which class of organic compound contains at least ...
Polonium isotopes in industry Po is used in static eliminator to
... ionizing – pertaining to the process by which an atom, molecule, or substance acquires a negative or positive charge. Commonly, one or more electrons are removed to give a negative charge. [return] isotope – one of two or more species of atoms of a given element (having the same number of protons in ...
... ionizing – pertaining to the process by which an atom, molecule, or substance acquires a negative or positive charge. Commonly, one or more electrons are removed to give a negative charge. [return] isotope – one of two or more species of atoms of a given element (having the same number of protons in ...
Fall Exam 1
... demonstrated the existence of more than one charge. neutrons. B. proved that Thomson’s “plum D. determined the charge on a single pudding” model of the atom’s electron. structure was correct. 19. Nobel prize winner Ernest Rutherford conducted an experiment with gold foil and alpha particles, leading ...
... demonstrated the existence of more than one charge. neutrons. B. proved that Thomson’s “plum D. determined the charge on a single pudding” model of the atom’s electron. structure was correct. 19. Nobel prize winner Ernest Rutherford conducted an experiment with gold foil and alpha particles, leading ...
CHEMICAL REACTIONS
... – Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken – Chemical reactions involve changes in matter, the making of new materials with new properties, and energy changes. – Symbols represent elements, formulas describe compounds, chemical equations describe ...
... – Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken – Chemical reactions involve changes in matter, the making of new materials with new properties, and energy changes. – Symbols represent elements, formulas describe compounds, chemical equations describe ...
Chemical bond
A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges, either between electrons and nuclei, or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are ""strong bonds"" such as covalent or ionic bonds and ""weak bonds"" such as Dipole-dipole interaction, the London dispersion force and hydrogen bonding.Since opposite charges attract via a simple electromagnetic force, the negatively charged electrons that are orbiting the nucleus and the positively charged protons in the nucleus attract each other. An electron positioned between two nuclei will be attracted to both of them, and the nuclei will be attracted toward electrons in this position. This attraction constitutes the chemical bond. Due to the matter wave nature of electrons and their smaller mass, they must occupy a much larger amount of volume compared with the nuclei, and this volume occupied by the electrons keeps the atomic nuclei relatively far apart, as compared with the size of the nuclei themselves. This phenomenon limits the distance between nuclei and atoms in a bond.In general, strong chemical bonding is associated with the sharing or transfer of electrons between the participating atoms. The atoms in molecules, crystals, metals and diatomic gases—indeed most of the physical environment around us—are held together by chemical bonds, which dictate the structure and the bulk properties of matter.All bonds can be explained by quantum theory, but, in practice, simplification rules allow chemists to predict the strength, directionality, and polarity of bonds. The octet rule and VSEPR theory are two examples. More sophisticated theories are valence bond theory which includes orbital hybridization and resonance, and the linear combination of atomic orbitals molecular orbital method which includes ligand field theory. Electrostatics are used to describe bond polarities and the effects they have on chemical substances.