chapter 2 - Scranton Prep Biology
... . An atom with a complete valence shell is unreactiveor inert' . Noble elements (e.g., helium, argon, and neon) have filled outer shells in their elemental state and are thus inert' . An atom with an incomplete valence shell is chemically reactive (tends to form chemical bonds uniil it has eight ele ...
... . An atom with a complete valence shell is unreactiveor inert' . Noble elements (e.g., helium, argon, and neon) have filled outer shells in their elemental state and are thus inert' . An atom with an incomplete valence shell is chemically reactive (tends to form chemical bonds uniil it has eight ele ...
File - Mr. Holz`s Website
... c. Why are the Elements in the first group SO reactive in water? Remember that video that showed Sodium, Lithium, Ceasium, etc. being dropped in water? Hint: It has something to do with the valence electrons Know the difference between ionic and covalent bonding. a. In ionic bonding, when atoms gain ...
... c. Why are the Elements in the first group SO reactive in water? Remember that video that showed Sodium, Lithium, Ceasium, etc. being dropped in water? Hint: It has something to do with the valence electrons Know the difference between ionic and covalent bonding. a. In ionic bonding, when atoms gain ...
Dr. Harris Chemistry 105 Practice Exam 1 Isotope Atomic Number
... Energy is quantized. Emission is due to specific transitions between ground and excited states. 18. Refer to the activity series in chapter 10. For the single replacement reactions below, write the half reactions. Label the reducing and oxidizing agents. Show the net ionic equation. If no reaction o ...
... Energy is quantized. Emission is due to specific transitions between ground and excited states. 18. Refer to the activity series in chapter 10. For the single replacement reactions below, write the half reactions. Label the reducing and oxidizing agents. Show the net ionic equation. If no reaction o ...
Midterm Review.ppt - Chemistry R: 4(AE)
... 1. Ar, Kr, Ne, Xe 2. Kr, Xe, Ar, Ne 3. Ne, Ar, Kr, Xe 4. Xe, Kr, Ar, Ne ...
... 1. Ar, Kr, Ne, Xe 2. Kr, Xe, Ar, Ne 3. Ne, Ar, Kr, Xe 4. Xe, Kr, Ar, Ne ...
Chemical reaction
... • Solution – a mixture in which one or more substances are uniformly distributed into another • Solute – the substance dissolved in the solution (Sugar) • Solvent – the substance in which the ...
... • Solution – a mixture in which one or more substances are uniformly distributed into another • Solute – the substance dissolved in the solution (Sugar) • Solvent – the substance in which the ...
Chapter 2 Outline
... Chemical bonds A. Electron energy is shared or donated B. Only valence electrons involved in chemical bonds (Octet rule) C. Ionic bonds – electrons are transferred from one atom to another, forming ions. Ions of opposite charge attract forming an ionic bond D. Most ionic compounds are salts E. Coval ...
... Chemical bonds A. Electron energy is shared or donated B. Only valence electrons involved in chemical bonds (Octet rule) C. Ionic bonds – electrons are transferred from one atom to another, forming ions. Ions of opposite charge attract forming an ionic bond D. Most ionic compounds are salts E. Coval ...
Covalent Bonding - Effingham County Schools
... Potential energy changes during the formation of a hydrogenhydrogen bond. (a) The separated hydrogen atoms do not affect each other. (b) Potential energy decreases as the atoms are drawn together by attractive forces. (c) Potential energy is at a minimum when attractive forces are balanced by repul ...
... Potential energy changes during the formation of a hydrogenhydrogen bond. (a) The separated hydrogen atoms do not affect each other. (b) Potential energy decreases as the atoms are drawn together by attractive forces. (c) Potential energy is at a minimum when attractive forces are balanced by repul ...
Covalent Bonding - Effingham County Schools
... Potential energy changes during the formation of a hydrogenhydrogen bond. (a) The separated hydrogen atoms do not affect each other. (b) Potential energy decreases as the atoms are drawn together by attractive forces. (c) Potential energy is at a minimum when attractive forces are balanced by repul ...
... Potential energy changes during the formation of a hydrogenhydrogen bond. (a) The separated hydrogen atoms do not affect each other. (b) Potential energy decreases as the atoms are drawn together by attractive forces. (c) Potential energy is at a minimum when attractive forces are balanced by repul ...
WS on obj. 1-11
... 14. _____ (T/F) Calcium will need to lose two electrons to get the electron configuration of argon. 15. _____ (T/F) All the alkaline earth elements (Group 2A) will need to lose two electrons to obtain a noble gas electron configuration. 16. _____ (T/F) All the elements of the oxygen group (Group 6A ...
... 14. _____ (T/F) Calcium will need to lose two electrons to get the electron configuration of argon. 15. _____ (T/F) All the alkaline earth elements (Group 2A) will need to lose two electrons to obtain a noble gas electron configuration. 16. _____ (T/F) All the elements of the oxygen group (Group 6A ...
File - Science With BLT
... b. Avogadro principle d. octet rule ____ 29. The electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does nitrogen need to satisfy the octet rule? a. 1 c. 5 b. 3 d. 8 ____ 30. The elements of the ____ group satisfy the octet rule without forming compounds. a. main c. alkali me ...
... b. Avogadro principle d. octet rule ____ 29. The electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does nitrogen need to satisfy the octet rule? a. 1 c. 5 b. 3 d. 8 ____ 30. The elements of the ____ group satisfy the octet rule without forming compounds. a. main c. alkali me ...
Chemistry I Honors – Semester Exam Review – Fall 2000
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
Semester Exam Review - Teach-n-Learn-Chem
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
Chemistry I Honors – Semester Exam Review – Fall 2000
... spent 5.5 min on each notebook, how many hours did it take him to grade all 95 notebooks? 18. Calculate the density from the slope of a "Mass vs. ...
... spent 5.5 min on each notebook, how many hours did it take him to grade all 95 notebooks? 18. Calculate the density from the slope of a "Mass vs. ...
ap chemistry chapter 8 bonding
... Formal Charge -used to determine the most accurate Lewis structure -is the difference between the # of valence electrons on the free atom and the # of valence electrons assigned to the atom in the molecule ...
... Formal Charge -used to determine the most accurate Lewis structure -is the difference between the # of valence electrons on the free atom and the # of valence electrons assigned to the atom in the molecule ...
Covalent Bonds - WordPress.com
... • A molecule consists of two or more atoms held together by covalent bonds • A single covalent bond, or single bond, is the sharing of only one pair of valence electrons • A double covalent bond, or double bond, is the sharing of two pairs of valence electrons • The double bonds are stronger than s ...
... • A molecule consists of two or more atoms held together by covalent bonds • A single covalent bond, or single bond, is the sharing of only one pair of valence electrons • A double covalent bond, or double bond, is the sharing of two pairs of valence electrons • The double bonds are stronger than s ...
Chapter 9
... Structural formulas use letter symbols & bonds to show relative positions of atoms. Hydrogen is always a terminal atom because it can bond with only 1 other atom. Resonance is a condition that occurs when more than one valid Lewis structure can be written for a molecule or ion. ...
... Structural formulas use letter symbols & bonds to show relative positions of atoms. Hydrogen is always a terminal atom because it can bond with only 1 other atom. Resonance is a condition that occurs when more than one valid Lewis structure can be written for a molecule or ion. ...
Chapter 3: The Structure of Matter
... natural elements •A natural element is one that is found in nature ...
... natural elements •A natural element is one that is found in nature ...
bonding notes for votech
... between elements close on periodic table (usually nonmetals) Not as strong as ionic bonds Forms molecules or diatomic molecules Atoms are too far away from each other to have a strong attraction. 1 atoms + nucleus attracts another’s e- cloud. But both clouds repel each other. Distance is right ...
... between elements close on periodic table (usually nonmetals) Not as strong as ionic bonds Forms molecules or diatomic molecules Atoms are too far away from each other to have a strong attraction. 1 atoms + nucleus attracts another’s e- cloud. But both clouds repel each other. Distance is right ...
Chapter 3 : Simple Bonding Theory Why do they make chemical
... possibilities of Lewis structure. 1. Structures with small FC (-2,+2 or less) are more likely. 2. Nonzero FCs on adjacent atoms are usually of opposite sign. 3. More electronegative atoms should have negative FC. 4. FCs of opposite signs separated by large distance are unlikely. 5. The largest sum o ...
... possibilities of Lewis structure. 1. Structures with small FC (-2,+2 or less) are more likely. 2. Nonzero FCs on adjacent atoms are usually of opposite sign. 3. More electronegative atoms should have negative FC. 4. FCs of opposite signs separated by large distance are unlikely. 5. The largest sum o ...
ATOMS
... • Most matter is in the form of COMPOUNDS or mixtures of compounds. For example: salt (NaCl), water (H20), carbon dioxide (CO2) • Compounds have properties UNLIKE those of their elements. For example: Salt—Sodium (Na) is a shiny, soft, gray, explosive metal with water & Chlorine (Cl) is a yellowish- ...
... • Most matter is in the form of COMPOUNDS or mixtures of compounds. For example: salt (NaCl), water (H20), carbon dioxide (CO2) • Compounds have properties UNLIKE those of their elements. For example: Salt—Sodium (Na) is a shiny, soft, gray, explosive metal with water & Chlorine (Cl) is a yellowish- ...
Chapter 2 BIO 100 Chemistry
... • Electrons = Negatively (-) charged particles that orbit around the nucleus. ...
... • Electrons = Negatively (-) charged particles that orbit around the nucleus. ...
Lecture 3 Chemistry
... Number of electrons in outer shell determines bonding properties chemical behavior ...
... Number of electrons in outer shell determines bonding properties chemical behavior ...
Chapter 4 REVIEW
... 21. Ionic compounds and metals have different physical properties because of the different forces involved. For example, while sodium chloride and nickel have nearly identical molar masses, their melting points, conductivity, and solubility in water are quite different. (a) Explain the large differe ...
... 21. Ionic compounds and metals have different physical properties because of the different forces involved. For example, while sodium chloride and nickel have nearly identical molar masses, their melting points, conductivity, and solubility in water are quite different. (a) Explain the large differe ...
Chemistry I Honors – Semester Exam Review – Fall 2000
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
... 8.7 hours slope = (mass) (volume) = density always record one estimate digit 1200 m 4.84 10-19 J Hydrogen atoms have specific energy levels. Therefore, the atoms can only gain or lose certain amounts of energy. When atoms lose energy, they emit photons which correspond to the lines in the emissi ...
Resonance (chemistry)
In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis formula. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms).Each contributing structure can be represented by a Lewis structure, with only an integer number of covalent bonds between each pair of atoms within the structure. Several Lewis structures are used collectively to describe the actual molecular structure, which is an approximate intermediate between the canonical forms called a resonance hybrid. Contributing structures differ only in the position of electrons, not in the position of nuclei.Electron delocalization lowers the potential energy of the substance and thus makes it more stable than any of the contributing structures. The difference between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the resonance energy or delocalization energy.Resonance is distinguished from tautomerism and conformational isomerism, which involve the formation of isomers, thus the rearrangement of the nuclear positions.