Avoid mixing up the words elements and array/items.

src/ch03-02-data-types.md

@@ -318,7 +318,7 @@ vector. Chapter 8 discusses vectors in more detail.
 An example of when you might want to use an array rather than a vector is in a
 program that needs to know the names of the months of the year. It’s very
 unlikely that such a program will need to add or remove months, so you can use
-an array because you know it will always contain 12 items:
+an array because you know it will always contain 12 elements:
 
 ```rust
 let months = ["January", "February", "March", "April", "May", "June", "July",
@@ -334,7 +334,7 @@ let a: [i32; 5] = [1, 2, 3, 4, 5];
 ```
 
 Here, `i32` is the type of each element. After the semicolon, the number `5`
-indicates the element contains five items.
+indicates the array contains five elements.
 
 Writing an array’s type this way looks similar to an alternative syntax for
 initializing an array: if you want to create an array that contains the same