2. beryllium (be) and fluorine (f) have only one stable isotope. use the sim and the periodic table to…
2. beryllium (be) and fluorine (f) have only one stable isotope. use the sim and the periodic table to complete the following table: element beryllium (be) fluorine (f) mass of 1 atom 9.01218 amu 18.99840 amu average mass of 2 atoms (sim) average mass of 3 atoms (sim) atomic mass (periodic table)
Answer
Explanation:
Step1: Recall atomic - mass concept
The atomic mass of an element is the average mass of its isotopes weighted by their natural abundances. Since beryllium (Be) and fluorine (F) have only one stable isotope, the mass of 1 atom is equal to the atomic mass from the periodic table. The atomic mass of Be from the periodic table is 9.01218 amu and for F is 18.99840 amu.
Step2: Calculate average mass of 2 atoms
For beryllium, if we have 2 atoms, the average mass of 2 atoms is $2\times9.01218 = 18.02436$ amu. For fluorine, the average mass of 2 atoms is $2\times18.99840=37.9968$ amu.
Step3: Calculate average mass of 3 atoms
For beryllium, the average mass of 3 atoms is $3\times9.01218 = 27.03654$ amu. For fluorine, the average mass of 3 atoms is $3\times18.99840 = 56.9952$ amu.
| Element | Mass of 1 atom | Average mass of 2 atoms (amu) | Average mass of 3 atoms (amu) | Atomic mass (periodic table) |
|---|---|---|---|---|
| Beryllium (Be) | 9.01218 amu | 18.02436 amu | 27.03654 amu | 9.01218 amu |
| Fluorine (F) | 18.99840 amu | 37.9968 amu | 56.9952 amu | 18.99840 amu |
Answer:
The completed table is shown above.