Question

Review for Ch NO GRADE Question 1 of 18 (1 point) | Question Attempt: 1 of 1 A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar System. Mass-spectroscopic analysis produced the follow data on the isotopes of tin in these samples: mass relative (amu) abundance isotope 115 So 114.90 58.% 120Sn 119.90 42.% Use these measurements to complete the entry for tin in the Periodic Table that would be used on 98765 ALEKS. Be sure your answers have the correct of significant digits Caution: your correct answer will have the same format but not necessarily the same numbers as the entry for tin in the Periodic Table we use here on E

Answer 1

relative atomic mass of tin=$\Sigma$(atomic mass of isotope x percentage abundance) /100

given

isotope with mass 114.90 and has 58% abundance

isotope with mass 119.90 with 42% abundance

relative atomic mass = (114.90 x58) +(119.90 x 42) /100

relative atomic mass = (6664.20 + 5035.80) /100

= 11700/100

relative mass of tin used in periodic table is = 117