Expert Q8A Done Show work 3289% 448776 am, 3-47 DI 4684 atiu A) 46.26 13. Determ
ID: 1033991 • Letter: E
Question
Expert Q8A Done Show work 3289% 448776 am, 3-47 DI 4684 atiu A) 46.26 13. Determine 45.91 m the number of protons eutrons and electrons in the folliowing o A) p 12 2512 C) p#12n+12 e+13 Dp 25 n 1213 p 12 13e25 14. Which of the follewing atoms, isotepes or lons costains 23 protons, 18 electrons and 27 A) B) 15 S. Antimony has an atomc mass of 121.257 amu and ely two isotepes. The abundance of the 21 hotope (120904 am")h5730%What isthe mass ofthe other isotope? A) 121.8 amu )1224 a C) 1226 am D) 1229 amu are isotopes? An atom that has an atomic number of 20 and a mass mumber of 42 is an isotope of an atom that has A) an atomic number of 20 and a mass number of 0 B) an atomic number of 21 and a mass number of 42 C) 22 meutrons and 20 protons D) 22 protons and 20 neutrons 17 Which of the following does NOT describe a metal A) good conductor of heat B) good conductor of electricity C) tends to gain electrons D) forms ionic compounds with nonmetals E) found on the left side of the periodic table 18. What is the formula for an loenic compound made of aluminum and oxygen? B) Al-o, 19. Identify the compound with ionic bonds A) Ne C) Na D) HO E) NH.Br 20. A Identify the compound with covalent bonds B) Kr C) KBr D) Lu shown is incorrect for the compound formed between the following E) NaCl A) strontium & carbonate SrCo C) potassium& acetate: KGH,0 E) lithium &sllate; LSO B) ammonium & cyanide NH.CN D) calcium & nitrate Ca(NOExplanation / Answer
12. atomic mass of element with given isotopes
mass = (44.876 x 0.3288 + 46.9443 x 0.6712) = 46.23 amu
A) 46.23 amu
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13. Numbe rof proton, neutron and electron for the iven element would be,
B) p = 12 n= 13 e = 12
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14. the ion that have the given number of proton, neutron and electron is,
A)
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15. atomic mass = 121.757 amu
121.757 = (121.904 x 0.5730 + other isotope mass x 0.427)
other isotope mass of antimony = 121.6 amu
C) 121.6 amu
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16. Istope of element with atomic number 20 and mass 42 would be,
A)
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17. The following does not describe a metal,
C) tend to gain electrons
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18. formula of ionic compound of Al and O,
B) Al2O3
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19. Compound with covalent bond
A) CH4
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20. Incorrect formula of compound
E) lithium sulfate LiSO4 (correct is Li2SO4)
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