The name of a substance is given to a student. He was asked to write its formula. What is the systematic method to be followed to derive the formula? Arrange the given statements in a proper sequence to obtain the formula.
(1) Symbol of positive ion or radical should be placed to the left-hand side and symbol of negative ion should be placed to the right-hand side.
(2) Place the valency with charge of respective radicals on the top right hand corner of their symbols.
(3) Write the symbols of the respective ions or radicals present in the given compound.
(4) Criss-cross the valency on the lower right hand side of ions/radicals.
(5) A radical consisting of more than one element has to be enclosed within the brackets if the respective number attained in criss-cross is more than one.
(6) No space should be left in between oppositely charged ions while writing the formula.

Options

A. 3 1 2 4 5 6
B. 4 3 6 2 5 1
C. 4 1 3 2 4 6
D. 5 6 4 2 1 3

Explanation

To derive the chemical formula of a substance systematically, follow these steps in the correct order:

### Step-by-Step Solution:

1. **Write the Symbols of the Ions or Radicals**:
Begin by identifying and writing down the symbols of the respective ions or radicals present in the compound. For example, for sodium chloride (NaCl), you would write Na for sodium and Cl for chlorine.

2. **Position the Ions**:
...