Element A has the electronic configuration 2,8,3 and element B has 2,6 .They will form the compound of the formula

Options

A. AB
B. `A_(2)B_(3)`
C. `A_(3)B_(2)`
D. `AB_(3)`

Explanation

To determine the formula of the compound formed by elements A and B based on their electronic configurations, we can follow these steps:

### Step 1: Identify the electronic configurations
- Element A has the electronic configuration of 2, 8, 3.
- Element B has the electronic configuration of 2, 6.

### Step 2: Determine the valency of each element
- For Element A (2, 8, 3):
- The outermost shell has 3 electrons.
- To achieve a stable octet (8 electrons), it needs to lose 3 electrons.
- Therefore, the valency of A is +3.

- For Element B (2, 6):
- The outermost shell has 6 electrons.
- To achieve a stable octet, it needs to gain 2 electrons.
- Therefore, the valency of B is -2.

### Step 3: Write the formula based on valencies
- The valency of A is +3 and the valency of B is -2.
- To combine the two elements in a neutral compound, we need to balance the total positive and negative charges.
- We can do this by finding the least common multiple (LCM) of the valencies:
- The LCM of 3 (from A) and 2 (from B) is 6.

### Step 4: Determine the number of atoms of each element
- To achieve a total charge of +6 from A, we need 2 atoms of A (2 x +3 = +6).
- To achieve a total charge of -6 from B, we need 3 atoms of B (3 x -2 = -6).

### Step 5: Write the final formula
- Therefore, the formula of the compound formed by elements A and B is A2B3.

### Conclusion
The compound formed by elements A and B will have the formula A2B3.

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