The atomic number of the element next to bromine (Atomic No. 35) in the same group is:

A) 43

B) 50

C) 56

D) 53

To determine the atomic number of the element next to bromine (atomic number 35) in the same group, we first need to identify which group bromine belongs to in the periodic table. Bromine is located in Group 17, which is known as the halogens. The elements in this group, in order of increasing atomic number, are fluorine (9), chlorine (17), bromine (35), iodine (53), and astatine (85).

Identifying the Element Next to Bromine

Since bromine is the third halogen, the element that comes next in the group is iodine, which has an atomic number of 53. Let’s break this down further to clarify:

• Fluorine: Atomic number 9
• Chlorine: Atomic number 17
• Bromine: Atomic number 35
• Iodine: Atomic number 53
• Astatine: Atomic number 85

Understanding Atomic Numbers

The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. This number also determines the element's position in the periodic table and its chemical properties. In the case of iodine, it follows bromine directly in the halogen group, making it the next element.

Evaluating the Options

Now, let’s look at the options provided:

• A) 43
• B) 50
• C) 56
• D) 53

Among these, the only atomic number that corresponds to iodine is option D) 53. The other options do not belong to the halogen group or do not follow bromine in the periodic table.

Final Thoughts

In summary, the atomic number of the element next to bromine in the same group is 53, which corresponds to iodine. This understanding of the periodic table and the relationships between elements is crucial for grasping concepts in chemistry, as it helps predict the behavior and properties of elements based on their group and period.