# How many valence electrons does bromine have?

- The atomic number of Bromine is 35 so, its electronic configuration is $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{2}}3{{d}^{10}}4{{p}^{5}}$ . The last shell is 4 and the electrons in the last shell are 7 (2 + 5). As we can see that the last electron is in the p-subshell, therefore, it is a p-block element.