The compound you're describing is sodium hydroxide, with the chemical formula NaOH.

Here's why:

* Sodium (Na): Sodium is an alkali metal with a +1 charge.

* Oxygen (O): Oxygen is a nonmetal with a -2 charge.

* Hydrogen (H): Hydrogen is a nonmetal with a +1 charge.

To balance the charges, you need one sodium ion (Na+), one hydroxide ion (OH-), which has a -1 charge overall.