Name the element which exhibit diagonal relationship with Be.

Answer

To determine the element that exhibits a diagonal relationship with Beryllium (Be), we can follow these steps:

### Step 1: Understand Diagonal Relationship
A diagonal relationship in the periodic table refers to the similarity in properties between elements that are positioned diagonally to each other. This often occurs between elements in different groups but in the same period.

### Step 2: Identify Beryllium's Position
Beryllium (Be) is located in Group 2 (alkaline earth metals) and Period 2 of the periodic table.

### Step 3: Locate the Diagonal Element
To find the element that exhibits a diagonal relationship with Beryllium, we look at the element that is located diagonally down from Be. This element is Aluminum (Al), which is located in Group 13 and Period 3.

### Step 4: Confirm Similar Properties
Beryllium and Aluminum show similar properties, such as forming amphoteric oxides and having similar ionic sizes. This similarity in properties is a key characteristic of diagonal relationships.

### Conclusion
The element that exhibits a diagonal relationship with Beryllium (Be) is Aluminum (Al).

### Final Answer
**Aluminum (Al)**

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