uiz CH1010 10-24-17 Due 10-26-17 1. Element A has an electronegativity of 0.8 an
ID: 548492 • Letter: U
Question
uiz CH1010 10-24-17 Due 10-26-17 1. Element A has an electronegativity of 0.8 and element B has an electronegativity of 3.0. Which statement best describes the bonding in A3B? A) The AB bond is largely covalent with a on A. B) The AB bond is largely covalent with a + on A. C) The compound is largely ionic with A as the cation. D) The compound is largely ionic with A as the anion. 2. Identify the fourth-row element X that forms the ion 2- o: A) Ge B) As C) Se D) Kr 3. How many lone pairs XeF6? of electrons are on the Xe atom in B) 1 C) 2 D) 3 4. Which one of the following is expected to exhibit resonance? A) NH4+ B) HCN C) CO2 D) NO2 5. Which pair of compounds below lists the molecule with the stronger dipole-dipole forces first? bCH, and CH CN H,F and CHF CH N and (CH)Explanation / Answer
1. option C is the correct answer. A. is a cation. Note that a compound is ionic, when the electronegativity difference is above 1.7
2. Se. is the correct answer. Option C. Kindly note that one lone pair and 4 bonds exists around the atom.
3. option B. one is the correct answer. Among 8 valence electrons, 6 are used for bonding. One pair is existing as lone pair.
4. NO2-, Option D is the correct answer.
As per the policy of Chegg, one question is answered
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