Answer:
Boron (B) has 3 valence electrons
Step-by-step explanation:
Valence electrons are the electrons present in the outermost energy level of an atom. For boron, which has an atomic number of 5, the electronic configuration is 2, 3. This means that boron has 2 electrons in the first energy level and 3 electrons in the second energy level.
The valence electrons of an element are determined by the group number it belongs to in the periodic table. Boron belongs to Group 13, which means it has 3 valence electrons. Valence electrons play a crucial role in determining the chemical properties of an element, including its reactivity and bonding behavior.
In summary, boron (B) has 3 valence electrons, as it is a member of Group 13 in the periodic table.