How to write compound in given atoms

To write the chemical formula for a compound given only the number of atoms, you will first need to determine the elements involved in the compound. Once you know the elements, you can then use their respective symbols to construct the formula.

Here's an example to illustrate the process:

Let's say we have a compound composed of 2 oxygen atoms and 4 hydrogen atoms.

1. Identify the elements:
In this case, the elements are oxygen (O) and hydrogen (H).

2. Determine the number of atoms for each element:
We have 2 oxygen atoms (O₂) and 4 hydrogen atoms (H₄).

3. Write the compound formula:
To construct the compound formula, simply combine the elements' symbols with their respective atom counts.

For oxygen, we have 2 atoms (O₂).
For hydrogen, we have 4 atoms (H₄).

Hence, the compound formula would be written as H₄O₂.

It's important to note that when writing chemical formulas, we use subscripts to indicate the number of atoms for each element. The subscript number is written after the element's symbol and represents the number of atoms present. Additionally, if the subscript is 1, it is often omitted.