On the basis of valencies of elements in a group, the formula of compound formed by tin with fluorine is

Options

A. SnF
B. `SnF_(3)`
C. `SnF_(6)`
D. `SnF_(4)`

Explanation

To determine the formula of the compound formed by tin (Sn) and fluorine (F), we need to analyze the valencies of both elements.

### Step-by-Step Solution:

1. **Identify the Elements**:
- The elements involved are tin (Sn) and fluorine (F).

2. **Determine the Group of Each Element**:
- Tin (Sn) is in Group 14 (or IV) of the periodic table, which is also known as the carbon family.
- Fluorine (F) is in Group 17 (or VII) of the periodic table, which is known as the halogen family.

3. **Identify the Valencies**:
- The valency of tin (Sn) can vary, but it commonly exhibits a valency of +4 when it forms compounds.
- The valency of fluorine (F) is -1, as it typically gains one electron to achieve a stable electron configuration.

4. **Combine the Valencies**:
- To form a neutral compound, the total positive charge must balance the total negative charge.
- Since tin can have a +4 charge and fluorine has a -1 charge, we need 4 fluorine atoms to balance the +4 charge from one tin atom.

5. **Write the Formula**:
- The formula for the compound formed by tin and fluorine is SnF4, which indicates that one tin atom combines with four fluorine atoms.

### Final Answer:
The formula of the compound formed by tin with fluorine is **SnF4**.

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