5. how many elements are in 3al₂o₃? 1 4 3 2 clear all

Answer

Explanation:

Step1: Identify elements in compound.

The compound is $Al_2O_3$. The elements are aluminum (Al) and oxygen (O). The coefficient 3 in front of $Al_2O_3$ only indicates the number of formula - units and does not affect the number of elements.

Answer:

D. 2