Be shows diagonal relationship with-

Options

A. `Li`
B. `Mg`
C. `Al`
D. `Ba`

Answer

To solve the question "Be shows diagonal relationship with-", we need to identify the element that exhibits similar properties to beryllium (Be) due to their diagonal positioning in the periodic table. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Diagonal Relationship
- Diagonal relationship refers to the similarity in properties between certain elements that are diagonally positioned in the periodic table.

**Hint:** Look for elements that are diagonally located in the periodic table, typically between groups 1 and 2 with groups 13 and 14.

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

**Hint:** Remember that Group 2 elements are characterized by having two electrons in their outer shell.

### Step 3: Determine the Diagonal Element
- The element that is diagonally positioned to beryllium is aluminium (Al), which is located in Group 13.

**Hint:** Check the periodic table to find the element that is one group to the right and one period down from beryllium.

### Step 4: Compare Properties of Beryllium and Aluminium
- Both beryllium and aluminium exhibit similar chemical properties:
- Both can form covalent compounds.
- Their chlorides (BeCl2 and AlCl3) are electron deficient.
- Their oxides (BeO and Al2O3) are solid, amphoteric, and have high melting points.

**Hint:** Look for specific properties that are shared between the two elements, such as their oxide and chloride characteristics.

### Step 5: Conclusion
- Based on the above analysis, we conclude that beryllium shows a diagonal relationship with aluminium.

**Final Answer:** Beryllium shows diagonal relationship with Aluminium (option C).