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Introduction to Chemistry
... Ionic- Two elements bond by transferring electrons to create ions that attract together (+ is attracted to - after an electron is transferred) ...
... Ionic- Two elements bond by transferring electrons to create ions that attract together (+ is attracted to - after an electron is transferred) ...
Chapter 4 Review, pages 262–267
... from the atom it bonds with. Covalent bonds typically form between atoms of non-metal elements. When the atoms are a certain optimum distance from each other, the attractive proton–electron force balances the repulsive proton–proton and electron–electron forces, and a covalent bond forms. The result ...
... from the atom it bonds with. Covalent bonds typically form between atoms of non-metal elements. When the atoms are a certain optimum distance from each other, the attractive proton–electron force balances the repulsive proton–proton and electron–electron forces, and a covalent bond forms. The result ...
Chem Regents 2015 A Few Things
... In BOTH types of cell the same types of reaction occur at the same electrode: ANode — OXidation ...
... In BOTH types of cell the same types of reaction occur at the same electrode: ANode — OXidation ...
Chemistry I Review - BarbaraElam-Rice
... 29) Describe the difference between cations and anions. How are they formed? ...
... 29) Describe the difference between cations and anions. How are they formed? ...
Theory of Chemical Bonds
... equ.( 5.11) we can see that the wave function differ from each other by the exchange of two signs of p-orbitals. The four wave functions ψ1-ψ4 in equ.( 5.11) span the tetrahedron that we expect for the bonds of the carbon atom. The (non-geometric) orthogonality of the functions ψ1-ψ4 can be easily s ...
... equ.( 5.11) we can see that the wave function differ from each other by the exchange of two signs of p-orbitals. The four wave functions ψ1-ψ4 in equ.( 5.11) span the tetrahedron that we expect for the bonds of the carbon atom. The (non-geometric) orthogonality of the functions ψ1-ψ4 can be easily s ...
Ch. 4-2 PowerPoint
... Experiments showed that electrons (like light) could be bent, or diffracted. Also, electron beams could interfere with each other. Diffraction – bending of light when passed through a crystal. Interference – overlapping of waves, reducing energy in some areas. ...
... Experiments showed that electrons (like light) could be bent, or diffracted. Also, electron beams could interfere with each other. Diffraction – bending of light when passed through a crystal. Interference – overlapping of waves, reducing energy in some areas. ...
Week # 9: Organic Chemistry - Hicksville Public Schools / Homepage
... molecules. As a result, melting points and boiling points are higher. EX: Octane, with eight carbon atoms, is a liquid at room temperature, whereas propane (the smaller molecule) with three carbon atoms is a gas, showing that it has weaker forces of attractions. 2. Organic compounds can be named wit ...
... molecules. As a result, melting points and boiling points are higher. EX: Octane, with eight carbon atoms, is a liquid at room temperature, whereas propane (the smaller molecule) with three carbon atoms is a gas, showing that it has weaker forces of attractions. 2. Organic compounds can be named wit ...
2013 Final Exam Answers
... A 1.0 L and 10.0 L contain the same number of gaseous He atoms. The flasks are at 25°C. Which of the following statements is false? ...
... A 1.0 L and 10.0 L contain the same number of gaseous He atoms. The flasks are at 25°C. Which of the following statements is false? ...
Chemistry Study Guide
... Coefficiant: the large number to the left of some of the chemical formulas indicates the number of that molecule in the equation. Ex: ...
... Coefficiant: the large number to the left of some of the chemical formulas indicates the number of that molecule in the equation. Ex: ...
Chemistry - Halifax County Public Schools
... Electrons have mass. Electrons have a negative charge. The charge of an electron is 1. Atoms have a dense, positive nucleus. ...
... Electrons have mass. Electrons have a negative charge. The charge of an electron is 1. Atoms have a dense, positive nucleus. ...
atomic theory of matter
... • Accepted method: Roman numeral in parentheses to indicate the charge. Not necessary when only one ionic charge possible. See Table 2.2. • Common method: Remove ending and add either -ous or -ic to • Latin form of the element used instead on some: Stannous, Stannic; ...
... • Accepted method: Roman numeral in parentheses to indicate the charge. Not necessary when only one ionic charge possible. See Table 2.2. • Common method: Remove ending and add either -ous or -ic to • Latin form of the element used instead on some: Stannous, Stannic; ...
CHEMISTRY ACTIVITY—MOLECULAR GEOMETRY Go to this
... Realize, then, that the 4 electron pairs around the central atom in H2O and in CH4 are not much different, except that some are unbonded (lone) in H2O. This accounts for the differences in shape and bond angle, since LONE PAIRS REPEL just like bonding pairs; in fact, they repel even more than bondin ...
... Realize, then, that the 4 electron pairs around the central atom in H2O and in CH4 are not much different, except that some are unbonded (lone) in H2O. This accounts for the differences in shape and bond angle, since LONE PAIRS REPEL just like bonding pairs; in fact, they repel even more than bondin ...
chapter 7 quiz
... J) 9.__G__The number of protons in the nucleus of an atom. K) electron 10._T__The number of protons and neutrons in the nucleus L) cathode of an atom. M) electron cloud 11._Y__Discovered radioactivity. N) Darth Vader 12._C__Discovered three types of radiation. O) chemical symbol 13._J__The charge on ...
... J) 9.__G__The number of protons in the nucleus of an atom. K) electron 10._T__The number of protons and neutrons in the nucleus L) cathode of an atom. M) electron cloud 11._Y__Discovered radioactivity. N) Darth Vader 12._C__Discovered three types of radiation. O) chemical symbol 13._J__The charge on ...
(2 hours) This paper con - University of Southampton
... Answers to Section A and Section B must be in separate answer books Answer all questions in Section A and only two questions in Section B. Section A carries 1/3 of the total marks for the exam paper and you should aim to spend about 40 mins on it. Section B carries 2/3 of the total marks for the exa ...
... Answers to Section A and Section B must be in separate answer books Answer all questions in Section A and only two questions in Section B. Section A carries 1/3 of the total marks for the exam paper and you should aim to spend about 40 mins on it. Section B carries 2/3 of the total marks for the exa ...
Electron Configuration
... As electron configurations can also be long and tedious, there is a shorthand form that conveys the same information ...
... As electron configurations can also be long and tedious, there is a shorthand form that conveys the same information ...
CHEM 1305 - HCC Learning Web
... PART I – Multiple Choice: (3 points each) -------1. What is the term for the value which indicates the number of protons for an atom of a given element? A) Atomic notation? B) Atomic number? C) Atomic mass? D) Mass number? -------2. What is the term for the shorthand description of the arrangement o ...
... PART I – Multiple Choice: (3 points each) -------1. What is the term for the value which indicates the number of protons for an atom of a given element? A) Atomic notation? B) Atomic number? C) Atomic mass? D) Mass number? -------2. What is the term for the shorthand description of the arrangement o ...
electron cloud - Wickliffe City School
... Periodic Table Trends Periodic Law “When arranged by increasing atomic number, the chemical elements display a regular and repeating pattern of chemical and physical properties.” Atoms with similar properties appear in groups or families (vertical columns) on the periodic table. all have the same n ...
... Periodic Table Trends Periodic Law “When arranged by increasing atomic number, the chemical elements display a regular and repeating pattern of chemical and physical properties.” Atoms with similar properties appear in groups or families (vertical columns) on the periodic table. all have the same n ...
Chapter 30 - The Chemical Basis of Animal Life
... given point at any particular moment in time; therefore, its location is given as an electron cloud. Because the number of negatively charged electrons outside the nucleus is equal to the number of positively charged protons, the atom is electrically uncharged or neutral. The number of protons and n ...
... given point at any particular moment in time; therefore, its location is given as an electron cloud. Because the number of negatively charged electrons outside the nucleus is equal to the number of positively charged protons, the atom is electrically uncharged or neutral. The number of protons and n ...
Unit 7: Chemical Equations & Reactions
... “Produces,” “Forms,” or “Yields”; indicates result of reaction ...
... “Produces,” “Forms,” or “Yields”; indicates result of reaction ...
AP Chemistry
... 2. Atomic masses; determination by chemical and physical means 3. Atomic number and mass number; isotopes 4. Electron energy levels: atomic spectra, quantum numbers, atomic orbitals 5. Periodic relationships including, for example, atomic radii, ionization energies, electron affinities, oxidation st ...
... 2. Atomic masses; determination by chemical and physical means 3. Atomic number and mass number; isotopes 4. Electron energy levels: atomic spectra, quantum numbers, atomic orbitals 5. Periodic relationships including, for example, atomic radii, ionization energies, electron affinities, oxidation st ...
On the Ionization Energy of the Outer Electrons of Atoms and Their
... some “spatial structures”, and the nature of which depends neither on the nucleus charge, nor on the number of the electrons in a shell. Keywords: Complex Atoms; Electronic Shells; Ionization Energy ...
... some “spatial structures”, and the nature of which depends neither on the nucleus charge, nor on the number of the electrons in a shell. Keywords: Complex Atoms; Electronic Shells; Ionization Energy ...
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.