WS on obj. 1-11
... 3. _____ (T/F) The number of valence electrons is very important in determining the chemical properties of an element. 4. _____ (T/F) The elements of a group have different numbers of valence electrons. 5. _____ (T/F) The representative groups 1A-7A have the same number of valence electrons as their ...
... 3. _____ (T/F) The number of valence electrons is very important in determining the chemical properties of an element. 4. _____ (T/F) The elements of a group have different numbers of valence electrons. 5. _____ (T/F) The representative groups 1A-7A have the same number of valence electrons as their ...
Slide 1 - MrCard.Org
... • If exothermic additional energy not needed to keep going as energy is being given off • If endothermic need constant supply of energy to keep going as energy is being absorbed ...
... • If exothermic additional energy not needed to keep going as energy is being given off • If endothermic need constant supply of energy to keep going as energy is being absorbed ...
Measuring and Calculating
... A period is likened to an energy level when completing energy level diagrams. Moving left to right, the attraction between the valence electrons and the nucleus increases, causing the atomic radius to decrease, and electronegativity and ionization energy to increase. ...
... A period is likened to an energy level when completing energy level diagrams. Moving left to right, the attraction between the valence electrons and the nucleus increases, causing the atomic radius to decrease, and electronegativity and ionization energy to increase. ...
Grade 11 Chemistry Exam Review
... The reaction of solutions of ammonium phosphate and barium nitrate gives a precipitate of barium phosphate. The equation that best represents this statement is a) 2(NH4)3PO4(s) + 3Ba(NO3)2(aq) → Ba3(PO4)2(aq) + 6NH4NO3(s). b) 2(NH4)3PO4(aq) + 3Ba(NO3)2(aq) → Ba3(PO4)2(s) + 6NH4NO3(aq). c) 2(NH4)3PO4 ...
... The reaction of solutions of ammonium phosphate and barium nitrate gives a precipitate of barium phosphate. The equation that best represents this statement is a) 2(NH4)3PO4(s) + 3Ba(NO3)2(aq) → Ba3(PO4)2(aq) + 6NH4NO3(s). b) 2(NH4)3PO4(aq) + 3Ba(NO3)2(aq) → Ba3(PO4)2(s) + 6NH4NO3(aq). c) 2(NH4)3PO4 ...
Biochemistry-Review of the Basics
... This allows for only the top layer of lakes/streams to freeze, protecting the ...
... This allows for only the top layer of lakes/streams to freeze, protecting the ...
Honors Chemistry
... 12. What does Bohr’s Model say about the hydrogen atom? 13. What does it mean when an electron is excited? What happens when the excited electron returns to the ground state? 14. What are the 4 sublevels of orbitals that can determine the shape of the orbitals? 15. In order to give an electron an ad ...
... 12. What does Bohr’s Model say about the hydrogen atom? 13. What does it mean when an electron is excited? What happens when the excited electron returns to the ground state? 14. What are the 4 sublevels of orbitals that can determine the shape of the orbitals? 15. In order to give an electron an ad ...
Chapter 5 – Chemical Reactions
... Particle size – the smaller the particles the faster the reaction (example – dust explosion) Higher temperature – the higher the temperature the faster the reaction Increase concentration of solution (a more concentrated acid will react faster than a dilute ...
... Particle size – the smaller the particles the faster the reaction (example – dust explosion) Higher temperature – the higher the temperature the faster the reaction Increase concentration of solution (a more concentrated acid will react faster than a dilute ...
document
... • If we supply 100J of heat to a system at constant pressure and it does 20J of work during expansion, the U of the system is +80J (w=-20J) – We can’t lose energy like this • Enthalpy, H, is a state function that we use to track energy changes at constant pressure H=U + PV • The change in enthalpy ...
... • If we supply 100J of heat to a system at constant pressure and it does 20J of work during expansion, the U of the system is +80J (w=-20J) – We can’t lose energy like this • Enthalpy, H, is a state function that we use to track energy changes at constant pressure H=U + PV • The change in enthalpy ...
Dr. Ali Ebneshahidi © 2016 Ebneshahidi
... Hydrogen Bond formed by weak attraction between H+ and nitrogen (N) or oxygen (O) [e.g. H of a water molecule attracting to O of another water molecule]. The weakest type of bonding. ...
... Hydrogen Bond formed by weak attraction between H+ and nitrogen (N) or oxygen (O) [e.g. H of a water molecule attracting to O of another water molecule]. The weakest type of bonding. ...
Unit 5 Study Guide
... Unit 5 Study Guide: Chemical Reactions 1. What are the 7 diatomic molecules? ...
... Unit 5 Study Guide: Chemical Reactions 1. What are the 7 diatomic molecules? ...
Assignment 2 Group A and B
... 9) Which of the following alcohols can be prepared by the reaction of methyl formate with excess Grignard reagent? A) 1-pentanol B) 2-pentanol C) 3-pentanol D) 2-methyl-2-pentanol E) 3-methyl-3-pentanol 10) What reagent(s) would you use to accomplish the following conversion? ...
... 9) Which of the following alcohols can be prepared by the reaction of methyl formate with excess Grignard reagent? A) 1-pentanol B) 2-pentanol C) 3-pentanol D) 2-methyl-2-pentanol E) 3-methyl-3-pentanol 10) What reagent(s) would you use to accomplish the following conversion? ...
Free Energy I
... An irreversible process is one in which the system and surroundings cannot be restored to their original state by exactly reversing the change. dropping a vase and breaking it reacting hydrogen and oxygen to form water burning a match ...
... An irreversible process is one in which the system and surroundings cannot be restored to their original state by exactly reversing the change. dropping a vase and breaking it reacting hydrogen and oxygen to form water burning a match ...
Measuring and Calculating
... electron pairs are drawn as either dots or straight lines bonded pairs are between atoms while nonbonded pairs are only on one atom ...
... electron pairs are drawn as either dots or straight lines bonded pairs are between atoms while nonbonded pairs are only on one atom ...
200 ways to pass the regents
... 92. Metallic bonds can be thought of as a crystalline lattice of kernels surrounded by a “sea” of mobile valence electrons. 93. Atoms are most stable when they have 8 valence electrons (an octet) and tend to form ions to obtain such a configuration of electrons. 94. Covalent bonds form when two atom ...
... 92. Metallic bonds can be thought of as a crystalline lattice of kernels surrounded by a “sea” of mobile valence electrons. 93. Atoms are most stable when they have 8 valence electrons (an octet) and tend to form ions to obtain such a configuration of electrons. 94. Covalent bonds form when two atom ...
Exam 2 Review - Iowa State University
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
Name: Period
... 1. In a single covalent bond, how would two atoms still achieve a stable noble-gas electron configuration? 2. How many electrons are required to create a single, double and triple covalent bond? 3. What is an unshared pair of electrons? 4. According to VSEPR theory, why do molecules adjust their sha ...
... 1. In a single covalent bond, how would two atoms still achieve a stable noble-gas electron configuration? 2. How many electrons are required to create a single, double and triple covalent bond? 3. What is an unshared pair of electrons? 4. According to VSEPR theory, why do molecules adjust their sha ...
The five main types of redox reactions are combination
... are those in which the oxidation states of the reactants change. This occurs because in such reactions, electrons are always transferred between species. Redox reactions take place through either a simple process, such as the burning of carbon in oxygen to yield carbon dioxide (CO2), or a more compl ...
... are those in which the oxidation states of the reactants change. This occurs because in such reactions, electrons are always transferred between species. Redox reactions take place through either a simple process, such as the burning of carbon in oxygen to yield carbon dioxide (CO2), or a more compl ...
