Posted by **Dennis** on Tuesday, March 13, 2007 at 7:03pm.

Classify each of these statements as always true, sometimes true, or never true.

__ST___13.In an equation, a substance is shown to be in the gaseous state by placing an upward-pointing arrow after its formula.

___ST___14. Atoms are destroyed in a chemical reaction.

___AT____15. A skeleton equation is not a balanced equation.

13. An upward arrow is used to designate a gas; (g) may also be sued. I think the statement is AT

14.Atoms are not destroyed except in radioactive decay and then they are changed to some other atom.

15. I think this one is correct if we agree on the definition of a skeleton equation.

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