化学
化学反应、化学计量、分子结构与元素性质。
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question 3 (2 points) tetrahedral molecules like ccl₄ with __1__ reds a…
1. I. 4 2. A. symmetrical 3. C. nonpolar 4. I. 4 5. B. asymmetrical 6. D. polar
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question 2 (2 points) planar trigonal molecules like so₃ with __1__ red…
1. H. 3 2. A. symmetrical 3. C. nonpolar 4. H. 3 5. B. asymmetrical 6. D. polar 7. H. 3 8. B. asymmetrical 9. D. polar
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use figure 1a in chapter 10 to answer the following questions. if a mol…
1. A. symmetrical 2. C. nonpolar 3. B. asymmetrical 4. D. polar 5. G. 2 6. A. symmetrical 7. C. nonpolar 8. G. 2 9. B. asymmetrical 10. D. polar
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question 5 (2 points) consider oxygen difluoride, of₂. the en for o is …
1. F. \(3.44\) 2. G. \(3.98\) 3. B. \(0.54\) 4. J. polar covalent (bond) 5. E. \(2\) (Since the formula is \(OF_{2}\), there are two \(O - F\) bonds) 6. L. polar (molecule)
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question 4 (2 points) consider oxygen dichloride, ocl₂. the en for chlo…
1. F. \(3.16\) 2. G. \(3.44\) 3. B. \(0.28\) 4. K. nonpolar covalent (bond) 5. J. polar covalent (bond) 6. M. nonpolar (molecule)
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question 3 (2 points) consider chlorine bromide, clbr. the en for cl is…
1. F. \(3.16\) 2. D. \(2.96\) 3. B. \(0.20\) 4. J. polar covalent (bond) 5. K. nonpolar covalent (bond) 6. L. polar (molecule)
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question 2 (2 points) consider fluorine chloride, fcl. the en for fluor…
1. G. 3.98 2. F. 3.16 3. B. 0.82 4. J. polar covalent (bond) 5. J. polar covalent (bond) 6. L. polar (molecule)
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electronegativity is a calculated value for each element and is based u…
1. \(4.0\) 2. \(0\) 3. non - polar covalent 4. polar
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question 5 (2 points) the en for h is __1__ and the en for n is __2__. …
1. E. 2.20 2. G. 3.04 3. C. 0.84 4. J. polar covalent 5. L. asymmetrical 6. N. polar
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to determine the lewis electron dot formula for ammonia, nh₃, the centr…
1. C. 3 2. A. 1 3. H. 8 4. F. 6 5. B. 2 6. D. 4 7. C. 3 8. A. 1 9. C. 3 10. R. pyramidal
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question 3 (2 points) water molecules are called __1__ molecules becaus…
1. A. polar 2. B. nonpolar 3. A. polar
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question 2 (2 points) water is a bent molecule with polar covalent bond…
1. A. polar 2. C. attracted
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electronegativity is the ability of an atom to pull electrons towards i…
1. E. \(2.20\) 2. G. \(3.44\) 3. C. \(1.24\) 4. J. polar
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question 5 (2 points) lets review what we learned about the lewis struc…
1. D. 4 2. B. 2 3. B. 2 4. H. repel 5. K. 109.5 6. O. bent
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the lewis electron dot structure for water shows 4 regions of electron …
1. E. 4 2. C. 2 3. C. 2 4. M. bent 5. N. 109.5
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question 3 (2 points) using the first steps, a water molecule is shown …
1. I. \(8\) 2. G. \(6\) 3. B. \(1\) 4. N. bonds 5. M. outer \(H\) atoms 6. L. central \(O\) atom
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question 2 (2 points) once the central atom is determined, and thus the…
1. B. covalent 2. D. dash 3. E. \((+)\) and/or \((-)\) charges 4. B. covalent
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question 1 (2 points) the molecular formula for water is h₂o. the first…
1. B. Oxygen 2. D. 1 3. E. 2 4. B. Oxygen 5. A. Hydrogen
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question 10 (1 point) use the molar mass of ca3(po3)2 to calculate the …
1. C. \(2.394\times 10^{4}\) 2. K. \(1.436\times 10^{5}\)
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question 9 (1 point) use the molar mass of ( ca_3(po_3)_2 ) to calculat…
1. \(0.0360\) (corresponds to option P) 2. \(2.16\times 10^{22}\) (corresponds to option F)
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question 8 (1 point) use the molar mass of ca3(po3)2 to calculate the m…
D. \(0.03595\)
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question 7 (1 point) use the data from the previous question calculate …
J. 34.51
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question 6 (1 point) use the periodic table to calculate the gfw (molar…
1. C 2. K 3. B 4. N 5. F 6. M 7. L
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balance the reaction, do not leave any fractions, dont leave anything b…
1. \(2\) 2. \(15\) 3. \(12\) 4. \(6\) 5. \(Y\) (combustion) 6. \(Z\) (yes) 7. \(EE\) (reduced) 8. \(Z\) (yes)
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balance the reaction, do not leave any fractions, dont leave anything b…
1. A. 1 2. C. 3 3. A. 2 4. C. 3 5. V. single displacement 6. Z. yes 7. DD. oxidized 8. AA. no
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balance the reaction, do not leave any fractions, dont leave anything b…
1. C (3) 2. B (2) 3. F (6) 4. A (1) 5. W (double displacement) 6. AA (no) 7. Z (yes)
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balance the reaction, do not leave any fractions, dont leave anything b…
1. \(C\) (for \(3Ca(OH)_2\)) 2. \(B\) (for \(2H_3PO_3\)) 3. \(A\) (for \(Ca_3(PO_3)_2\)) 4. \(I\) (for \(6H_2O\)) 5. \(X\) (neutralization) 6. \(W\) (double displacement) 7. \(AA\…
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balance the reaction, do not leave any fractions, dont leave anything b…
5. X. neutralization 6. W. double displacement 7. AA. no 8. Z. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. J. tetrahedral 3. N. no
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answer the questions about the following model there are __1__ reds (re…
1. D. 3 2. H. trigonal planar 3. N. no
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answer the questions about the following model. there are __1__ reds (r…
1. D. 3 2. I. bent (\(120^{\circ}\)) 3. M. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. J. tetrahedral 3. N. no
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answer the questions about the following model there are __1__ reds (re…
1. D. 3 2. I. bent (\(120^{\circ}\)) 3. M. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. K. pyramidal 3. M. yes
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answer the questions about the following model there are __1__ reds (re…
1. D. 3 2. I. bent (\(120^{\circ}\)) 3. M. yes
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answer the questions about the following model there are __1__ reds (re…
1. D. 3 2. I. bent (\(120^{\circ}\)) 3. M. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. N. bent (\(109.5^{\circ}\)) 3. U. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. V. no
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. L. tetrahedral 3. U. yes
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answer the questions about the following model there are __1__ reds (re…
1. E. 4 2. J. tetrahedral 3. N. no
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question 5 (2 points) consider the carbonate ion, co₃⁻². the lewis stru…
1. B. 1 2. D. 3 3. H. 120 4. L. planar trigonal 5. P. symmetrical
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question 4 (2 points) consider the oxalate ion, c₂o₄⁻². the lewis struc…
1. C. 2 2. D. 3 3. H. 120 4. L. planar trigonal 5. P. symmetrical
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consider dinitrogen tetroxide, n₂o₄. the lewis structure has __1__ cent…
1. C. 2 2. D. 3 3. H. 120 4. L. planar trigonal 5. P. symmetrical
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consider dicarbon tetrachloride, c₂cl₄. the lewis structure has __1__ c…
1. C. 2 2. D. 3 3. H. 120 4. L. planar trigonal 5. P. symmetrical
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question 1 (2 points) consider sulfur dichloride, scl₂. the lewis struc…
E. 4, I. 109.5, M. bent, Q. asymmetrical
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consider nitrogen trichloride, ncl₃. the lewis structure has 3 single b…
E. 4, I. 109.5, N. pyramidal, Q. asymmetrical
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element: # protons: # neutrons: # electrons: mass number:
element: fluorine # protons: \( 9 \) # neutrons: \( 10 \) # electrons: \( 10 \) mass number: \( 19 \)
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1. carbon has an electron configuration of 1s² 2s² 2p². which electron …
O. \(1s^{2}2s^{2}2p^{4}\)
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question 4 (2 points) consider carbon tetrachloride, ccl₄. the lewis st…
1. E. 4 2. I. 109.5 3. O. tetrahedral 4. P. symmetrical
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average atomic mass (2.5) calculate the average atomic mass of each of …
The average atomic mass of lithium is approximately $6.54$ amu.
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question 3 (2 points) consider sulfur dioxide, so₂. the lewis structure…
1. D. 3 2. H. 120 3. M. bent 4. Q. asymmetrical
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the shape of a molecule depends upon the number of reds at the central …
1. C. 2 2. F. 180 3. K. linear 4. P. symmetrical
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question 2 (2 points) consider sulfur trioxide, so3. the lewis structur…
1. D. 3 2. H. 120 3. L. planar trigonal 4. P. symmetrical
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in the double replacement reactions shown in the lab, what signs of a c…
a precipitate was formed, a gas was produced
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what is a possible product in the reaction of sodium hydroxide with mag…
magnesium hydroxide
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there is a reaction between magnesium sulfate and sodium carbonate. wha…
White
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is there a reaction between lead (ii) nitrate and potassium iodide?* 4 …
Yes
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1. when shaving the face, how should you hold the facial skin as you sh…
1. Taut 2. Electric razor 3. Use an up - and - down motion and shave with the grain
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question 13 use your answers from the previous three questions (questio…
H - 1 has a higher percent abundance than H - 2 # Question 14
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for the following double replacement reaction, choose the correct produ…
2NaCl + BaSO₄
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for the following double replacement reaction, choose the correct produ…
\(\text{Ag}_{2}\text{CrO}_{4}+\text{KNO}_{3}\)
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directions: drag the number of isotope atoms indicated below into the b…
1. \(80\) 2. \(20\) 3. \(1.20\)
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for the following double replacement reaction, complete the reaction in…
\(Ca(NO_{3})_{2}+K_{2}CO_{3} ightarrow CaCO_{3}+2KNO_{3}\)
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directions: drag the number of isotope atoms indicated below into the b…
1. \(20\) 2. \(80\) 3. \(1.80\)
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directions: drag the number of isotope atoms indicated below into the b…
1. $50$ 2. $50$ 3. $1.50$
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for the following single replacement reaction, choose the correct produ…
\(\text{Fe}+\text{Al}_{2}\text{O}_{3}\)
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for the following single replacement reaction, choose the correct produ…
\(Cu + ZnCl_{2}\)
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for the following single replacement reaction, complete the reaction in…
\(MgCl_{2}+Pb\)
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what is the relationship between natural abundance and stability? choos…
If the natural abundance is high, the isotope is stable; If the natural abundance is low, the isotope is unstable.
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question 8 isotopes are atoms of the select element, which means they a…
If the natural abundance is high, the isotope is stable; If the natural abundance is low, the isotope is unstable.
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complete the data table below by filling in the missing data. symbol na…
Protons: \(9\) Neutrons: \(10\) Electrons: \(9\) Atomic Mass: \(19.00\) Abundance: \(100\) Stable or Unstable: stable
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complete the data table below by filling in the missing data.
Protons: 2 Neutrons: 2 Electrons: 2 Atomic Mass: 4.00 Abundance: 99.999866 Stable or Unstable: stable
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1. which intervention would be an organization - centered approach? amb…
1. Repairing devices or equipment 2. TRUE 3. Chemicals in locked room 4. Put a hazard sign over the water 5. Create a culture of safety
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1. in which of the following locations should you dilute a cleaning che…
1. Utility room with open windows 2. Farthest from the entrance 3. Clean and disinfect 4. Place the linen in a soiled linen bag for transport 5. True
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6. what is a complication of alzheimers disease that is common in the l…
6. Aspiration pneumonia 7. Delirium 8. Paranoia 9. Vitamin B 10. Brain tissue examination
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use a model to determine bond character 9 use your electronegativity pe…
Electronegativity difference for \(HF\): \(1.88\), Bond character: b) polar covalent. For \(N_2\): ## Step1: Find electronegativity values \(\text{EN}_N = 3.04\) (for both \(N\) a…
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figure c these three figures show that in a game of tug - of - war, the…
The electronegativity difference is \(2.1\). \(NaCl\) forms an ionic bond. The tug - of - war figure with a large imbalance in pulling strength (where one side is clearly dominant…
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identify all of the items that represent an element and not a molecule.…
H, Li, Ne
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review each of the chemical compounds and classify each one as either p…
- Polar: \(H_2Te\), \(AsH_3\) - Nonpolar: \(SiBr_4\), \(I_2\)
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storyline 1 exam with the exception of he, how many valence electrons d…
8
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storyline 1 exam 66 of 73 a student is conducting an experiment on an u…
It should be conductive as a solution. As a solid, it should be able to dissolve in water.
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storyline 1 exam which of the following statements about covalent bonds…
- Covalent bonds hold the atoms together in discrete molecules. - Covalent bonds form when atoms of nonmetals are close enough to each other for their orbitals to overlap. - Coval…
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the diagram shows the electron configuration around the chlorine nucleu…
7; 7+
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storyline 1 exam choose the atomic symbols that best complete the sente…
First blank: \(Na\), Second blank: \(Cs\)
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storyline 1 exam which pattern(s) may be observed from the arrangement …
- increasing number of protons - similarity in their physical and chemical properties - similarity in the number of their valence electrons
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the image shows particles in three different states of matter. select t…
Particles in all three containers possess kinetic energy.
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storyline 1 exam which of the molecules has the highest boiling point? …
Liquid 4: $CH_3CH_2CH_2CH_3$
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storyline 1 exam the formula for a molecule of ethane (c₂h₆) is a combi…
Six atoms of hydrogen and two atoms of carbon.
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which pair of words correctly completes the statement? alkali metals ar…
reactive, lose 1 electron
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storyline 1 exam use naming rules to explain why the following statemen…
The statement is incorrect. The correct name is lead(IV) chloride. The use of "tetra - " is inappropriate for a metal - non - metal compound where the metal (\(Pb\)) has a variabl…
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storyline 1 exam based on the periodic table, which other element is li…
Cs
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organic chemists identified four different liquids of varying volatilit…
A. Ⅳ < Ⅲ < Ⅱ < Ⅰ
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read the passage and use the diagram to answer the next two questions. …
- The resulting chlorine anion has a stable octet in its valence shell. - The electrostatic attraction between the positive ion and negative chlorine forms an ionic bond. - The re…