Use the periodic table to answer the question. An illustration shows the periodic table. Which element has the same number of valence electrons as bromine (Br)? (1 point)
chlorine (Cl)
krypton (Kr)
selenium (Se)
potassium (K)
Well, let's see... bromine (Br) is in Group 17, also known as the halogens. Halogens are known for having 7 valence electrons. So, which element has the same number of valence electrons as bromine (Br)? Well, chlorine (Cl) is also a halogen in Group 17, so I guess bromine and chlorine are like two peas in a pod when it comes to valence electrons. They're a real bromance, if you will! So, the answer is chlorine (Cl).
To determine which element has the same number of valence electrons as bromine (Br), we need to identify the group number or column of bromine on the periodic table. Valence electrons are the electrons found in the outermost energy level of an atom and are mainly responsible for the atoms' chemical behavior.
Bromine is found in group 17 (also known as group VIIA or group 7) of the periodic table. Elements in this group are also known as halogens and have seven valence electrons.
Now, let's examine the options provided:
1. Chlorine (Cl) is also found in group 17 and has seven valence electrons. Therefore, chlorine is a viable option.
2. Krypton (Kr) is a noble gas and is found in group 18 (group VIIIA or group 8). Noble gases have full valence shells with eight electrons, except for helium, which has only two. Hence, krypton does not have the same number of valence electrons as bromine.
3. Selenium (Se) is in group 16 (group VIA or group 6) of the periodic table. Elements in this group, known as chalcogens, have six valence electrons. Therefore, selenium does not have the same number of valence electrons as bromine.
4. Potassium (K) is in group 1 (group IA or group 1) and has one valence electron. Therefore, potassium does not have the same number of valence electrons as bromine.
Based on the information above, the correct answer is chlorine (Cl), as it is also in group 17 and has seven valence electrons, just like bromine.
To determine which element has the same number of valence electrons as bromine (Br), we need to look at the periodic table.
Bromine (Br) is in Group 17, also known as the halogens. In Group 17, each element has 7 valence electrons.
Now, let's look at the answer choices:
- Chlorine (Cl) is also in Group 17 and has 7 valence electrons, the same as bromine.
- Krypton (Kr) is in Group 18 (noble gases) and has 8 valence electrons.
- Selenium (Se) is in Group 16 and has 6 valence electrons.
- Potassium (K) is in Group 1 and has 1 valence electron.
Therefore, the element that has the same number of valence electrons as bromine (Br) is chlorine (Cl).