Lone pair Study guides, Class notes & Summaries
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AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022
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AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022. MARK SCHEME – AS CHEMISTRY – 7404/2 – JUNE 2022 
Organic names 
As a general principle, non-IUPAC names or incorrect spelling or incomplete names 
should not gain credit. Some illustrations are given here. 
Unnecessary but not wrong numbers will not be penalised such as the number ‘2’ in 2- 
methylpropane or the number ‘1’ in 2-chlorobutan-1-oic acid. 
but-2-ol should be butan-2-ol 
2-hydroxybut...
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Portage Chemistry 219 100% VERIFIED SOLUTIONS CORRECT ANSWER
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Portage Chemistry 219 
100% VERIFIED 
SOLUTIONS CORRECT 
ANSWER 
The lone pairs in a LDD are equal to: - ANSWER The 2 dots 
The unpaired electrons are equal to: - ANSWER The 1 dot 
What is the number of bonds an atom can form, equal to? - ANSWER Their unpaired 
electrons 
Find the lone pair, the unpaired electrons and the bonds of Oxygen. - ANSWER 2, 2, 2 
What is organic chemistry? - ANSWER The study of compounds that contain carbon 
What is catenation? - ANSWER The ability to form bonds betw...
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AQA A-level CHEMISTRY 7405/1 Paper 1 Inorganic and Physical Chemistry Version: 1.0 FinalQUESTION PAPER & MARKING SCHEME/ [MERGED] Mark scheme June 2023
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CHEM 219 Module 1 Problem Set Principles of Organic Chemistry with Lab Gallaher Portage Learning.
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CHEM 219 Module 1 Problem Set Principles of Organic Chemistry with Lab Gallaher Portage Learning. 
Score for this quiz: 10 out of 10 
Submitted Jul 25 at 8:42pm 
This attempt took 1,135 minutes. 
Question 1 0 / 0 pts 
Your Answer: 
On a piece of scratch paper, write out the Lewis Dot Diagram for each of 
the indicated elements and determine the following for each: 
a) The number of Lone Pairs the atom possesses in its valence 
shell. 
b) The number of Unpaired Electrons the atom possesses in its...
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Solution Manual for Organic Chemistry Mechanistic Patterns Canadian 1st Edition by Ogilvie Ackroyd Br
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Chapter 1 Carbon and Its Compounds CHECKPOINT PROBLEMS Practice Problem 1.1 a) S — 1s2 2s2 2p6 3s2 3p4 b) Cl — 1s2 2s2 2p6 3s2 3p5 c) Na+ — 1s2 2s2 2p6 1-2 Copyright © 2018 Nelson Education Limited Practice Problem 1.2 a) Count valence electrons. Build a basic bonding framework and account for electrons used. Add remaining electrons and check for formal charges. The molecule has a lone pair on the nitrogen. All other electrons are bonding electrons. b) Count valence electrons. Build a bas...
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Test Bank For Organic Chemistry 9th Edition by John E. McMurry
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Chapter 01 - Structure and Bonding 
1. Give the ground-state electron configuration for carbon (atomic number 6). 
1s22s22px12py1 or 1s22s22p2 
2. Give the ground-state electron configuration for fluorine (atomic number 9). 
ANSWER: 
POINTS: 1 
1s22s22px2 2py2 2pz1 or 1s22s22p5 
3. Give the ground-state electron configuration for magnesium (atomic number 12). 
1s22s22p63s2 
4. How many electrons does silicon have in its valence shell? 
ANSWER: four POINTS: 1 
Exhibit 1-1 
Write valid Lewis (elec...
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AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS covalent bond - ANSWER-a shared pair of electrons between non-metal elements co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom repulsion in shapes of molecu
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AQA CHEMISTRY A LEVEL WITH COMPLETE SOLUTIONS 
 
 
covalent bond - ANSWER-a shared pair of electrons between non-metal elements 
 
co-ordinate bond - ANSWER-a shared pair of electrons where both electrons are supplied by one atom 
 
repulsion in shapes of molecules - ANSWER-Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair 
 
electronegativity - ANSWER-the power of an atom to attract the pair of electrons in a covalent bond 
 
hess' law - ANSWER-Total enthalpy chang...
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CHEM 1311 CHAPTER 10: CHEMICAL BONDING II: MOLECULAR GEOMENTRY AND HYBRIDIZATION OF ATOMIC ORBITALS
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Chapter 10: Chemical Bonding II: Molecular Geometry and 
Hybridization of Atomic Orbitals 
1. Give the number of lone pairs around the central atom and the molecular geometry of 
CBr4. 
A) 0 lone pairs, square planar D) 1 lone pair, trigonal bipyramidal 
B) 0 lone pairs, tetahedral E) 2 lone pairs, square planar 
C) 1 lone pair, square pyramidal 
Ans: B Category: Medium Section: 10.1 
2. Give the number of lone pairs around the central atom and the molecular geometry of 
SCl2. 
A) 0 lone pairs, ...
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CHEM 219 Module 1 Problem Set Principles of Organic Chemistry with Lab Gallaher Portage Learning.
- Exam (elaborations) • 18 pages • 2024
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CHEM 219 Module 1 Problem Set Principles of Organic Chemistry with Lab Gallaher Portage Learning. 
Score for this quiz: 10 out of 10 
Submitted Jul 25 at 8:42pm 
This attempt took 1,135 minutes. 
Question 1 0 / 0 pts 
Your Answer: 
On a piece of scratch paper, write out the Lewis Dot Diagram for each of 
the indicated elements and determine the following for each: 
a) The number of Lone Pairs the atom possesses in its valence 
shell. 
b) The number of Unpaired Electrons the atom possesses in its...
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Chem 210 Final Exam Questions and Correct Answers, With Complete Solution, 2024.
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Chem 210 Final Exam Questions and Correct Answers, With Complete Solution, 2024. 
 
SOPBAR 
used to find degrees of unsaturation 
((2C+2)-H-X+N)/2 
Resonance Rules 
-no breaking single bonds 
-do not exceed octet 
-keep net charge the same 
-try to have full octets (most stable) 
Resonance Patterns 
1. Lone pair e- next door to pi bond 
2. Pi bond next to positive charge 
3. Double bond btwn atoms of differing electronegativity (ex: carbonyl) 
Curved Arrows 
show movement of pair of electrons 
s...
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