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2. What is the charge for CO3?

  • CO3 +
  • CO3 2-
  • CO3 -

3. What is the charge for Sulphur?

  • S 2-
  • S +
  • S -

4. What is the charge for Iron (III)?

  • Fe 3+
  • Fe 2+
  • Fe 3-

5. What is the charge for Iodine?

  • I 2-
  • I -
  • I +
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