Atomic Structure - Hudson City School District
... See the trend of how electrons fill the valence shells • Lewis dot structures • Octet Rule – electrons fill a shell until it’s full with 8 electrons • Atoms are most stable with a filled outer electron shell ...
... See the trend of how electrons fill the valence shells • Lewis dot structures • Octet Rule – electrons fill a shell until it’s full with 8 electrons • Atoms are most stable with a filled outer electron shell ...
H 2 O
... • Acid - A chemical compound that dissociates into one or more hydrogen ions (H+) and one or more negative ions (anions). An acid donates H+ ions (protons) to solutions • Base - Dissociates into one or more positive ions (cations) and one or more hydroxide ions (OH-). A base accepts H+ ions and remo ...
... • Acid - A chemical compound that dissociates into one or more hydrogen ions (H+) and one or more negative ions (anions). An acid donates H+ ions (protons) to solutions • Base - Dissociates into one or more positive ions (cations) and one or more hydroxide ions (OH-). A base accepts H+ ions and remo ...
Chapter 2. The Chemical Context of Life
... Two atoms can share more than one pair of electrons double bonds (2 pairs of electrons) triple bonds (3 pairs of electrons) ...
... Two atoms can share more than one pair of electrons double bonds (2 pairs of electrons) triple bonds (3 pairs of electrons) ...
MULTIPLE CHOICE. Choose the one alternative that best completes
... 29) During ionization, water molecules disrupt the ionic bonds of a solute and a mixture of ions is produced. These ions are called A) anions. B) dissociates. C) anti-ions. D) electrolytes. E) cations. ...
... 29) During ionization, water molecules disrupt the ionic bonds of a solute and a mixture of ions is produced. These ions are called A) anions. B) dissociates. C) anti-ions. D) electrolytes. E) cations. ...
2. Essential Chemistry
... o A covalent bond is when two atoms share one or more pairs of outer-shell electrons (valence electrons) o In a covalent bond, the shared electrons count as part of each atom’s valence shell o Much stronger than ionic bonds – holds lots of Energy o A single covalent bond, or single bond, is the shar ...
... o A covalent bond is when two atoms share one or more pairs of outer-shell electrons (valence electrons) o In a covalent bond, the shared electrons count as part of each atom’s valence shell o Much stronger than ionic bonds – holds lots of Energy o A single covalent bond, or single bond, is the shar ...
2. Chemistry of Living Things Outline
... When electrons are transferred from one atom to another, _______ atoms become electrically ____________. The atom that __________ electrons becomes ____________ charged. The atom that __________ electrons becomes ____________ charged. The ions with ___________ electrical charges are ____________ to ...
... When electrons are transferred from one atom to another, _______ atoms become electrically ____________. The atom that __________ electrons becomes ____________ charged. The atom that __________ electrons becomes ____________ charged. The ions with ___________ electrical charges are ____________ to ...
Chemistry of Living Things Outline
... It shows the _____________ and kinds of atoms present in a compound. It is a kind of “shorthand” that scientists use. o The chemical formula for sugar is C6H12O6. This means that in one molecule of sugar there are six carbon atoms, twelve hydrogen atoms and six oxygen atoms. o H2O (___________ ...
... It shows the _____________ and kinds of atoms present in a compound. It is a kind of “shorthand” that scientists use. o The chemical formula for sugar is C6H12O6. This means that in one molecule of sugar there are six carbon atoms, twelve hydrogen atoms and six oxygen atoms. o H2O (___________ ...
File
... composition that is uniform throughout, all the way down to the molecular level. • Hydrocarbon-any molecule consisting of only hydrogen and carbon atoms, typically fossil fuels and other compounds derived from them. • Ion- a charged atom, it has either gained or lost an electron. • Isotope-any varie ...
... composition that is uniform throughout, all the way down to the molecular level. • Hydrocarbon-any molecule consisting of only hydrogen and carbon atoms, typically fossil fuels and other compounds derived from them. • Ion- a charged atom, it has either gained or lost an electron. • Isotope-any varie ...
Elements, basic principles, periodic table
... Elements in same columns (periodic behavior) behave similarly due to similar electron configura:ons. Outer most electrons most important in chemistry since more readily lost and/or shared (= interac:on) In ...
... Elements in same columns (periodic behavior) behave similarly due to similar electron configura:ons. Outer most electrons most important in chemistry since more readily lost and/or shared (= interac:on) In ...
Final Exam Practice-2017
... only needs one double bond. b) CO2 has a different number of electrons than SO2; therefore SO2 needs 2 double bonds and CO2 only needs one double bond. c) CO2 has a different number of electrons than SO2; therefore C needs a lone pair while S does not. d) The above statement is incorrect. Both CO2 a ...
... only needs one double bond. b) CO2 has a different number of electrons than SO2; therefore SO2 needs 2 double bonds and CO2 only needs one double bond. c) CO2 has a different number of electrons than SO2; therefore C needs a lone pair while S does not. d) The above statement is incorrect. Both CO2 a ...
Deconstructed HS-PS1-2
... trends in the periodic table, and knowledge of the patterns of chemical properties.[Clarification Statement: Examples of chemical reactions could include the reaction of sodium and chlorine, of carbon and oxygen, or of carbon and hydrogen.] [Assessment Boundary: Assessment is limited to chemical rea ...
... trends in the periodic table, and knowledge of the patterns of chemical properties.[Clarification Statement: Examples of chemical reactions could include the reaction of sodium and chlorine, of carbon and oxygen, or of carbon and hydrogen.] [Assessment Boundary: Assessment is limited to chemical rea ...
Chemistry Midterm Review Study Guide 2012
... Each atom contains a certain number of electrons which move around the nucleus in fixed energy levels. The e- are on orbits. When an atom is in the ground state, the e- s are in the lowest possible energy level. When heat or electricity is applied the e- jumps to higher energy levels that are furthe ...
... Each atom contains a certain number of electrons which move around the nucleus in fixed energy levels. The e- are on orbits. When an atom is in the ground state, the e- s are in the lowest possible energy level. When heat or electricity is applied the e- jumps to higher energy levels that are furthe ...
Chemical Bond - Cobb Learning
... Add subscripts so that the sum of the positive and negative oxidation numbers is zero. The Crisscross Method or Swap N’ Drop Method can also work. 4) All compounds are neutral so the oxidation numbers should combine in ratios that will add up to zero. The number of ions combining in the compound wil ...
... Add subscripts so that the sum of the positive and negative oxidation numbers is zero. The Crisscross Method or Swap N’ Drop Method can also work. 4) All compounds are neutral so the oxidation numbers should combine in ratios that will add up to zero. The number of ions combining in the compound wil ...
Nature of Molecules and Water
... • Bohr model – electrons in discrete orbits • Electrons have potential energy related to their position – Electrons farther from nucleus have more energy ...
... • Bohr model – electrons in discrete orbits • Electrons have potential energy related to their position – Electrons farther from nucleus have more energy ...
Atomic Theory Practice Test
... c. not bound together b. less stable d. at a high potential energy ____ 21. The chemical bond formed when two atoms share electrons is called a(n) a. ionic bond. c. Lewis structure. b. orbital bond. d. covalent bond. ____ 22. The B—F bond in BF3 (electronegativity for B is 2.0; electronegativity for ...
... c. not bound together b. less stable d. at a high potential energy ____ 21. The chemical bond formed when two atoms share electrons is called a(n) a. ionic bond. c. Lewis structure. b. orbital bond. d. covalent bond. ____ 22. The B—F bond in BF3 (electronegativity for B is 2.0; electronegativity for ...
Biology\Ch 2 Chemistry
... A structural formula shows which atoms bond where and by sharing or “stealing” how many electrons. Ex: Chemical formula: CO2 Structural formula: O = C = O This shows carbon is between the two oxygen atoms and that 2 electrons are shared between each oxygen and the carbon. All atoms (except Helium a ...
... A structural formula shows which atoms bond where and by sharing or “stealing” how many electrons. Ex: Chemical formula: CO2 Structural formula: O = C = O This shows carbon is between the two oxygen atoms and that 2 electrons are shared between each oxygen and the carbon. All atoms (except Helium a ...
Science Olympiad
... ______ 5. In the lanthanide elements, which orbitals are only partially filled? (A) 5s and 4d (B) 5d and 4f (C) 6s and 5d (D) 6p and 5f (E) 4f only ______ 6. Ions with the electronic structure 1s2 2s2 2p6 3s2 3p6 would not be present in which aqueous solution? (A) NaF(aq) (B) NaCl(aq) (C) KBr(aq) ( ...
... ______ 5. In the lanthanide elements, which orbitals are only partially filled? (A) 5s and 4d (B) 5d and 4f (C) 6s and 5d (D) 6p and 5f (E) 4f only ______ 6. Ions with the electronic structure 1s2 2s2 2p6 3s2 3p6 would not be present in which aqueous solution? (A) NaF(aq) (B) NaCl(aq) (C) KBr(aq) ( ...
Chemistry Of The Human Body
... Developing a Hypothesis 1. Use the “If”, “Then” format. 2. If (a certain condition exists), Then (predict the results) ...
... Developing a Hypothesis 1. Use the “If”, “Then” format. 2. If (a certain condition exists), Then (predict the results) ...
Chemistry Of The Human Body
... Developing a Hypothesis 1. Use the “If”, “Then” format. 2. If (a certain condition exists), Then (predict the results) ...
... Developing a Hypothesis 1. Use the “If”, “Then” format. 2. If (a certain condition exists), Then (predict the results) ...
Chemistry Unit Test Study Guide (2012-2013)
... Elements are arranged by increasing ____________________. The atomic mass of an element is determined by _______________________________________. The atomic number of an element represents ________________________________________. Metals are found on the left / right side of the staircase on ...
... Elements are arranged by increasing ____________________. The atomic mass of an element is determined by _______________________________________. The atomic number of an element represents ________________________________________. Metals are found on the left / right side of the staircase on ...
Chapter 8
... The force that holds two atoms together is called a chemical bond. They may form by the attraction of a positive nucleus and a negative electron They can also form between a positive an negative ion Remember, opposites attract! ...
... The force that holds two atoms together is called a chemical bond. They may form by the attraction of a positive nucleus and a negative electron They can also form between a positive an negative ion Remember, opposites attract! ...
Review-Semester Final (Part I)
... 18. Which holds its electrons more tightly- metals or nonmetals? How does this affect the properties of each? ...
... 18. Which holds its electrons more tightly- metals or nonmetals? How does this affect the properties of each? ...
Units 3 and 4 Revision
... Q4. Explain why the metal elements in group 1 are (a) called the alkali metals. (b) stored under oil. Q5. What happens to the melting point of the elements in group 7 (the halogens) as you go the group? Answers:- Q3. Lithium. Q4. (a) The elements in group 1 react with water to form an ...
... Q4. Explain why the metal elements in group 1 are (a) called the alkali metals. (b) stored under oil. Q5. What happens to the melting point of the elements in group 7 (the halogens) as you go the group? Answers:- Q3. Lithium. Q4. (a) The elements in group 1 react with water to form an ...
1 Chemistry 400: General Chemistry Name: Miller Fall 2015 Final
... involved and their percents of ionization. (8 points) ...
... involved and their percents of ionization. (8 points) ...
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.