Calculate the number of valence electrons in BF3.
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To calculate the number of valence electrons in BF3, you need to determine the number of valence electrons possessed by each individual atom in the molecule.
1. Locate the position of each atom in the periodic table.
- B (Boron) is in group 13.
- F (Fluorine) is in group 17.
2. Find the number of valence electrons for each atom.
- Boron (B) has 3 valence electrons.
- Fluorine (F) has 7 valence electrons.
3. Since there are three fluorine atoms in BF3, multiply the number of valence electrons for fluorine (7) by the number of fluorine atoms (3): 7 × 3 = 21.
4. Add the valence electrons from boron (3) to the result obtained in step 3: 21 + 3 = 24.
Therefore, BF3 has a total of 24 valence electrons.