Which of the following happens when an ionic bond is formed?
A. One atom pulls an electron from another atom.
B. Two atoms attain equal electronegativities.
C. One atom becomes more electronegative than another atom.
D. Two atoms share an electron.
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Which statement about bonding is correct?
A. Forming bonds releases energy and is exothermic.
B. Forming bonds requires energy and is endothermic.
C. Breaking bonds releases energy and is endothermic.
D. Breaking bonds requires energy and is exothermic.
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The bond energy between carbon and oxygen is 358 for a single bond (C–O) and 745 for a double bond (C=O). Why is the bond energy higher for double-bonded carbon and oxygen (C=O)?
A. Additional bonds require less energy to break, so the bond energy is higher.
B. Additional electrons attract each other, decreasing the distance between atoms, and increasing bond energy.
C. Additional electrons repel each other, increasing the distance between atoms, and increasing bond energy.
D. Additional bonds require more energy to break, so the bond energy is higher.
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Use the bond energies to answer the question.
H–H = 432
H–O = 467
O–O = 146
O=O = 495
H2 (H–H) combines with O2 (O=O) to become hydrogen peroxide (H2O2) bonded as such: H–O–O–H. Which option shows the difference in total bond energy between the reactants and the products?
A. 1,0801,080
B. −927
C. −153
D. 153
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Water (H2O) has two O–H bonds. The electronegativity of oxygen is 3.5, whereas hydrogen is 2.1. Which statement best describes the type of bond this molecule has and how the electrons behave?
A. O–H bonds are polar covalent, and hydrogen pulls the shared electrons toward it.
B. O–H bonds are nonpolar covalent, and oxygen pulls the shared electrons toward it.
C. O–H bonds are nonpolar covalent, and hydrogen pulls the shared electrons toward it.
D. O–H bonds are polar covalent, and oxygen pulls the shared electrons toward it.
20 answers
C
C
D
D
I finished mine
They are not.
1: one atom pulls an electronic from another atom
2: forming bonds releases energy and is exothermic
3:additional bonds require more energy to break, so the energy is higher
The last 2 are correct
number 4 is -153 not 153
1. One atom pulls an electron from another atom.
2. Forming bonds releases energy and is exothermic.
3. Additional bonds require more energy to break, so the bond energy is higher.
4. −153
5. O–H bonds are polar covalent, and oxygen pulls the shared electrons toward it.
1. One atom pulls an electron from another atom.
2. Forming bonds releases energy and is exothermic.
3.pull electrons away from other elements.
4. Additional bonds require more energy to break, so the bond energy is higher.
5. −153
Just took quick check
1 answer