Question

instructions: in each question, identify the element with the greatest atomic mass:

1. chlorine (cl), iodine (i), bromine (br), fluorine (f)
2. oxygen (o), carbon (c), nitrogen (n), boron (b)
3. lithium (li), silicon (si), sulfur (s), xenon (xe)

Explanation:

Step1: Recall atomic masses

Atomic mass of Chlorine ($Cl$) is approximately $35.5\ g/mol$, Iodine ($I$) is approximately $126.9\ g/mol$, Bromine ($Br$) is approximately $79.9\ g/mol$, Fluorine ($F$) is approximately $19\ g/mol$.

Step2: Compare values

Since $126.9>79.9 > 35.5>19$.

Step3: Recall atomic masses

Atomic mass of Oxygen ($O$) is approximately $16\ g/mol$, Carbon ($C$) is approximately $12\ g/mol$, Nitrogen ($N$) is approximately $14\ g/mol$, Boron ($B$) is approximately $10.8\ g/mol$.

Step4: Compare values

Since $16>14 > 12>10.8$.

Step5: Recall atomic masses

Atomic mass of Lithium ($Li$) is approximately $6.9\ g/mol$, Silicon ($Si$) is approximately $28.1\ g/mol$, Sulfur ($S$) is approximately $32.1\ g/mol$, Xenon ($Xe$) is approximately $131.3\ g/mol$.

Step6: Compare values

Since $131.3>32.1 > 28.1>6.9$.

Answer:

1. Iodine ($I$)
2. Oxygen ($O$)
3. Xenon ($Xe$)