Here's how to determine the number of hydrogen atoms in NH₄₂S:

1. Understand the Formula:

* NH₄₂S: This represents the compound ammonium sulfide.

* NH₄: This is the ammonium ion (NH₄⁺).

* 2: The subscript '2' indicates there are two ammonium ions.

* S: This is the sulfide ion (S²⁻).

2. Count the Hydrogen Atoms:

* Each ammonium ion (NH₄) contains 4 hydrogen atoms.

* Since there are two ammonium ions, we multiply: 4 hydrogen atoms/ion * 2 ions = 8 hydrogen atoms.

Therefore, there are 8 hydrogen atoms present in NH₄₂S.