What is the difference between the number of electrons in an atom of bromine,Br, and the number of electrons in an atom of aluminum, Al?
Br is atomic number 35 so the neutral atom has 35 protons and 35 electrons.
Al is atomic number 13 so the neutral atom has 13 protons and 13 electrons.
To find the difference between the number of electrons in an atom of bromine (Br) and aluminum (Al), we first need to determine the number of electrons each atom has.
To do this, we can refer to the periodic table. Bromine (Br) is in Group 17, while aluminum (Al) is in Group 13. The group number on the periodic table tells us the number of valence electrons an atom has.
For bromine (Br), which is in Group 17, it means it has 7 valence electrons, as Group 17 elements typically have 7 valence electrons.
For aluminum (Al), which is in Group 13, it means it has 3 valence electrons, as Group 13 elements typically have 3 valence electrons.
Therefore, the difference in the number of electrons between bromine (Br) and aluminum (Al) is:
7 (number of electrons in Br) - 3 (number of electrons in Al) = 4 electrons
Hence, there is a difference of 4 electrons between the number of electrons in an atom of bromine and an atom of aluminum.