Question

1. diagram: nitrogen (n) atom at center, four hydrogen (h) atoms around it

	number
elements
compounds

Explanation:

Step1: Determine number of elements

Elements are distinct types of atoms. Here, we have H (Hydrogen) and N (Nitrogen), so count the distinct elements.
Number of elements: 2 (H and N)

Step2: Determine number of compounds

A compound is a substance with two or more elements. The structure is \(NH_4\) (ammonium - like, or \(NH_4^+\) but as a molecule here, it's a compound). So there's 1 compound.

Answer:

	Number
Elements	2
Compounds	1

(For the "Elements" row, the answer is 2; for "Compounds" row, the answer is 1. If you need individual answers for each blank: Elements: 2, Compounds: 1)