<|system|>
Complete the statement.
Titanium is ().
A: a compound
B: an elementary substance</s>.
<|user|>
Can you answer based on context?
<|assistant|>
You can tell whether titanium is an elementary substance or a compound by counting the number of symbols in its chemical formula. A symbol contains either one capital letter or a capital letter followed by one or two lowercase letters.
The chemical formula for titanium is Ti. This formula contains one symbol: Ti. So, the formula tells you that titanium is made of one chemical element.
Substances made of only one chemical element are elementary substances. So, titanium is an elementary substance.