Here's why:

* Calcium (Ca) is an alkaline earth metal with a +2 charge.

* Hydrogen (H) typically forms a +1 charge when bonding as a cation.

* Oxygen (O) typically forms a -2 charge when bonding as an anion.

The charges don't balance in CaHO. To form a neutral compound, you would need to adjust the ratios of the elements.

Possible Correct Formulas:

* Ca(OH)₂: This is calcium hydroxide, a common compound.

* CaH₂: This is calcium hydride.

If you have a different formula in mind, please provide it, and I can help you find the correct chemical name.