Valence electrons are the electrons in the outermost shell of an atom and are important for determining how an element will react chemically. Here are the valence electrons for calcium, oxygen, and phosphorus:
- Calcium (Ca): Calcium is in group 2 of the periodic table and has 2 valence electrons.
- Oxygen (O): Oxygen is in group 16 of the periodic table and has 6 valence electrons.
- Phosphorus (P): Phosphorus is in group 15 of the periodic table and has 5 valence electrons.
So, to summarize:
- Calcium: 2 valence electrons
- Oxygen: 6 valence electrons
- Phosphorus: 5 valence electrons