Which of the following is the correct chemical formula for titanium(II) oxide?

• A. Ti_2O
• B. Ti_2O_3
• C. TiO
• D. TiO_2

Answer: (C)

Verified step by step guidance

1. Identify the oxidation state of titanium in titanium(II) oxide. The Roman numeral II indicates that titanium has a +2 charge (Ti^{2+}).
2. Recognize that oxide ion (O) typically has a charge of -2 (O^{2-}).
3. To write the correct formula, balance the total positive and negative charges so the compound is electrically neutral.
4. Since Ti^{2+} and O^{2-} have charges of equal magnitude but opposite sign, they combine in a 1:1 ratio.
5. Therefore, the correct chemical formula is TiO, representing one titanium ion and one oxide ion.