nala 61. Which of the following atoms have fvs its second energy level? sulfur t
ID: 146295 • Letter: N
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nala 61. Which of the following atoms have fvs its second energy level? sulfur trons orbit a Hydrogen b. nitrogem c.carbon d oysen 62. Which type of chemical bond involves ing of only 2 electrons between asoms? d. polar covalent bond van der Waal forces hydrogen bond - b. ionic bond mplir covalent bond s 63. Why does each carbon atom form Sour covalent bonds? a. b. Because carbon has a high electronegativity Because the most common isotope has four neutrons tends to give up four electroms to balance the charge of its protons Because carbon needs to share four Because carbon atoms has four electron orbitals electrons with other atoems in order to fill its outer valence energy level c e. ow many electrons does an oxygen atom share with other atoms in order to complete its valence (outer energy level) shell? 65. If an ion has a charge of+1, which of the following must be true? a It has two more protons than neutrons bi It has the same number of protons as electrons c. It has one more electron than it does protons d. It has one more proton than it does electrons type of bond is formed when the atoms sharing electrons have the same electronegativity? a) ionic bond 66. b.hydrogen bond e.monpolar covalent bond d. polar covalent bond 67. A covalent bond is likely to be polar when which of the following occurs? the two atoms sharing electrons are equally electronegative carbon is one of the two atoms sharing electrons the two atoms sharing electrons are the same elements one of the atoms sharing electrons is more electronegative than the other atom a. b. 68. Which of the following is true of hydrocarbon molecules such as CH, and CiH i ate beuse the majority of their bonds are polar covalent carboa-to-hydrogen linkages c. They are insoluble in water because they lack electronegative atoms like gxxan and they mostly form nonpolar b. They are hydrophilic because they are soluble in water covalent carbon-to-hydrogen linkages They are soluble in water because they form negative and positive charged regions Both answer choices e and d are correct d. 69. Which of the following statements is true concerning a molecule that contains bydroxyl groups as its predominant functional group? a. It won't form hydrogen bonds with water b. It is hydrophobic c. It should dissolve in a nonpolar solvent rather than water d. It is soluble in water because it can form hydrogen bonds with water molecules 70, Which type of covalent bond results from an unequal 71. At what Celsius degree temperature is water 72. Which of the following chemical bonds are formed between water molecules that cause cohesion attraction of water e. It lacks an asymmetric carbon, and it is probably a fat or lipid a polar b. nonpolar c. ionic d. hydrogen e. hydrophobic interaction a. Zero b. -20 c.4 d. 20 e. 100 f electrons between atoms? e water molecules are closest togethed? molecules to one another? a ionic bonds b. hydrophobic interactions c.nonpolar covalent bonds d. hydrogen bonds e.polar covalent bonds 73. Partial negative charges occur on which component of water molecules why?Explanation / Answer
61)b
Since nitrogen have total 7 electron. 1st shell have 2 and the second shell shell 5 electrons.
62)c
Non polar covalent bonds are the bonds formed between atoms having almost equal power of attracting electron towards itself.
63)d
Since for the stability of the carbon atom it needs 4 more electrons to complete it's octet. So they form four covalent bonds.
64)b
Since the outer shell of oxygen has only 6 electrons which is two electron deficient to complete it's octet.
65)d
+ Charge on an ion shows it is deficient in one electron i.e it has excess on proton in the nucleus.
66) c
Since same power of attracting the electrons.
67)d
The atom with more electronegativity will attract electron towards itself more than the less electronegative atom.
71)c
72)d
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