Which element has the same number of valence electrons as bromine (Br)?
selenium (Se)
selenium (Se)
krypton (Kr)
krypton (Kr)
potassium (K)
potassium (K)
chlorine (Cl)
chlorine (Cl)
The element that has the same number of valence electrons as bromine (Br) is chlorine (Cl).
To determine which element has the same number of valence electrons as bromine (Br), we need to look at the periodic table.
Bromine is in Group 17 (Group VIIA) of the periodic table, which is also known as the halogens. The halogens have 7 valence electrons because they are in the 7th column or group of the periodic table.
Now, let's look at the given options:
- Selenium (Se) is in Group 16 (Group VIA) of the periodic table. Therefore, it has 6 valence electrons, not the same as bromine.
- Krypton (Kr) is a noble gas and is in Group 18 (Group VIIIA) of the periodic table. Noble gases have full valence shells and do not readily lose or gain electrons, so krypton has 8 valence electrons, not the same as bromine.
- Potassium (K) is in Group 1 (Group IA) of the periodic table. It has 1 valence electron, not the same as bromine.
- Chlorine (Cl) is in Group 17 (Group VIIA), just like bromine. Therefore, it has the same number of valence electrons as bromine, which is 7.
So, the element that has the same number of valence electrons as bromine is chlorine (Cl).