group iv elements
... The structure of the elements range from macro-molecular non-metals through metalloids to metallic lattices of close-packed ions. Carbon exists either as a diamond formation or as graphite, in either form, there are strong covalent bonds between the carbon atoms which must be broken, resulting in a ...
... The structure of the elements range from macro-molecular non-metals through metalloids to metallic lattices of close-packed ions. Carbon exists either as a diamond formation or as graphite, in either form, there are strong covalent bonds between the carbon atoms which must be broken, resulting in a ...
Honors Midterm - Stamford High School
... Metallic bonds consist of the attractions of the free-floating valence electrons for the positively charged metal ions. The free floating valence electrons make metals good conductors and light reflecting off of the free floating valence electrons that travel around the outside of metal give metal ...
... Metallic bonds consist of the attractions of the free-floating valence electrons for the positively charged metal ions. The free floating valence electrons make metals good conductors and light reflecting off of the free floating valence electrons that travel around the outside of metal give metal ...
Semester 1 Final Exam Study Guide
... 24. A graduated cylinder has 20 ml (cm3) of water placed in it. An irregularly shaped rock is then dropped in the graduated cylinder and the volume of the rock and water in the cylinder now reads 30 ml (cm3). The mass of the rock dropped into the graduated cylinder is 23 grams. a. Find the volume o ...
... 24. A graduated cylinder has 20 ml (cm3) of water placed in it. An irregularly shaped rock is then dropped in the graduated cylinder and the volume of the rock and water in the cylinder now reads 30 ml (cm3). The mass of the rock dropped into the graduated cylinder is 23 grams. a. Find the volume o ...
Review for Test II
... A. Atomic elements exist in nature as single atoms B. Molecular elements exist as diatomic molecules, H2, N2, O2, F2, Cl2, Br2, I2 Compounds held by covalent bonds -Molecular compounds formed between two or more nonmetals - Attractive forces maximum at bond position - Sharing of electrons A. Every s ...
... A. Atomic elements exist in nature as single atoms B. Molecular elements exist as diatomic molecules, H2, N2, O2, F2, Cl2, Br2, I2 Compounds held by covalent bonds -Molecular compounds formed between two or more nonmetals - Attractive forces maximum at bond position - Sharing of electrons A. Every s ...
Chapter 4 Test Question Topics
... 1- Know the definitions of the ground state and the excited states of an atom. 2- What must occur for an atom to move from the ground to the excited state or from the excited to the ground state? 3- Know the definitions of an electron cloud and an atomic nucleus. 4- What determines the size and shap ...
... 1- Know the definitions of the ground state and the excited states of an atom. 2- What must occur for an atom to move from the ground to the excited state or from the excited to the ground state? 3- Know the definitions of an electron cloud and an atomic nucleus. 4- What determines the size and shap ...
Molecular Models Lab - Valley Catholic School
... The purpose of this lab is to evaluate the geometries, polarities, resonance, and hybridization of molecules. Many physical and chemical properties of compounds depend upon the shape or geometry of the molecule and its polarity. A hemoglobin molecule, for example, becomes ineffective as an oxygen tr ...
... The purpose of this lab is to evaluate the geometries, polarities, resonance, and hybridization of molecules. Many physical and chemical properties of compounds depend upon the shape or geometry of the molecule and its polarity. A hemoglobin molecule, for example, becomes ineffective as an oxygen tr ...
Ionic bonding
... • 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 & Cl-1. • Electrostatic force causes the ions to come together to form salt crystals. ...
... • 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 & Cl-1. • Electrostatic force causes the ions to come together to form salt crystals. ...
Details
... Structure of the atom, the early atomic theories, theories of electromagnetic radiation, Plank theory, Bohr theory. Quantum theory, Schrodinger wave equation, quantum numbers, shapes of orbitals and electronic configuration. Periodic classification of the elements and periodic relationship among the ...
... Structure of the atom, the early atomic theories, theories of electromagnetic radiation, Plank theory, Bohr theory. Quantum theory, Schrodinger wave equation, quantum numbers, shapes of orbitals and electronic configuration. Periodic classification of the elements and periodic relationship among the ...
Zumdahl Chapter
... First Year Chemistry Podcast DVD Featuring Jonathan Bergmann and Aaron Sams from Peak Educational Consulting LLC All Rights Reserved © This is an interactive page that allows you to get to all of the content on this DVD. Click to each unit packet or podcast. The podcasts require Quicktime and the pa ...
... First Year Chemistry Podcast DVD Featuring Jonathan Bergmann and Aaron Sams from Peak Educational Consulting LLC All Rights Reserved © This is an interactive page that allows you to get to all of the content on this DVD. Click to each unit packet or podcast. The podcasts require Quicktime and the pa ...
test2 contoh(30sept 2010) Word document - e
... 30. What is total number of lone pairs in the best Lewis structure for SOF 4 that exceeds the octet rule (S is the central atom all the other atoms are connected to it )? ...
... 30. What is total number of lone pairs in the best Lewis structure for SOF 4 that exceeds the octet rule (S is the central atom all the other atoms are connected to it )? ...
VSEPR Power Point
... central atom. Multiple bonds (double and triple) count as one. The number of bonding and nonbonding electron pairs determines the geometry of electron pairs and the molecular geometry. E.g. Determine the geometry of the following: ...
... central atom. Multiple bonds (double and triple) count as one. The number of bonding and nonbonding electron pairs determines the geometry of electron pairs and the molecular geometry. E.g. Determine the geometry of the following: ...
Document
... central atom. Multiple bonds (double and triple) count as one. The number of bonding and nonbonding electron pairs determines the geometry of electron pairs and the molecular geometry. E.g. Determine the geometry of the following: ...
... central atom. Multiple bonds (double and triple) count as one. The number of bonding and nonbonding electron pairs determines the geometry of electron pairs and the molecular geometry. E.g. Determine the geometry of the following: ...
Atomic Theory - World of Teaching
... the size of the individual atoms. the net electrical charge of the individual molecules. the average speed of movement of the individual molecules. ...
... the size of the individual atoms. the net electrical charge of the individual molecules. the average speed of movement of the individual molecules. ...
File
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
Unit 3: Electrons
... Light (Einstein) and electrons (de Broglie) have a dual nature: particle and wave. The nature of light/electrons depends on the technique one uses to study them. Complex mathematical models are the basis for the quantum mechanical model of the atom. Schrödinger’s wavefunctions produc atomic orbi ...
... Light (Einstein) and electrons (de Broglie) have a dual nature: particle and wave. The nature of light/electrons depends on the technique one uses to study them. Complex mathematical models are the basis for the quantum mechanical model of the atom. Schrödinger’s wavefunctions produc atomic orbi ...
File - Ingolstadt Academy
... Dimensional analysis Instruments that measure mass, volume, pressure, etc. (lab stuff!) The Scientific Method Atomic Structure: ...
... Dimensional analysis Instruments that measure mass, volume, pressure, etc. (lab stuff!) The Scientific Method Atomic Structure: ...
Lone pairs
... 2 metals share electrons but no chemical reaction occurs Valence electrons are free to move about between the atoms Positive ions surrounded by a “sea” of mobile electrons Allows metals to be formed into any shape ...
... 2 metals share electrons but no chemical reaction occurs Valence electrons are free to move about between the atoms Positive ions surrounded by a “sea” of mobile electrons Allows metals to be formed into any shape ...
A1985ANN1800001
... Historically, there have been two main approaches to a quantum-mechanical description of chemical bonding in a molecule. One, popularized ...
... Historically, there have been two main approaches to a quantum-mechanical description of chemical bonding in a molecule. One, popularized ...
New substances are formed by chemical reactions. When elements
... non-metal atoms gain electrons to form negatively charged ions ...
... non-metal atoms gain electrons to form negatively charged ions ...
The topic that fascinated me the most in my Science lessons this
... electron is further away. It therefore loses its electron readily to a halogen atom (e.g. chlorine). Beryllium, a much smaller metal atom, can hold on to its valence electron when partnering a chlorine atom because its valence electron is nearer to the positively charged nucleus. Therefore, Berylli ...
... electron is further away. It therefore loses its electron readily to a halogen atom (e.g. chlorine). Beryllium, a much smaller metal atom, can hold on to its valence electron when partnering a chlorine atom because its valence electron is nearer to the positively charged nucleus. Therefore, Berylli ...
Chapter 8 Notes
... ii) salts - form when a positively charged metal ion (cation) is electrostatically attracted to any other kind of negative ion (anion) Another way of classifying ionic compounds: i) Binary Ionic Compounds – contain only two different elements i.e. NaCl ii) Non-binary Ionic Compounds – ie. CuSO4 Prop ...
... ii) salts - form when a positively charged metal ion (cation) is electrostatically attracted to any other kind of negative ion (anion) Another way of classifying ionic compounds: i) Binary Ionic Compounds – contain only two different elements i.e. NaCl ii) Non-binary Ionic Compounds – ie. CuSO4 Prop ...
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.