The ammonium ion (NH₄⁺) has a +1 charge. Here's how to find an element that forms an ion with the same charge:

* Consider Group 1 elements: Group 1 elements (alkali metals) like lithium (Li), sodium (Na), potassium (K), etc., all readily lose one electron to form +1 ions.

Therefore, elements in Group 1 (alkali metals) form ions with the same charge as the ammonium ion.