Question

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1. can table salt be found on the periodic table of elements?
2. is it true that we can use a chemical symbol to determine whether we have an element or a compound? why or why not?
3. how are elements and compounds different in terms of their structure?
4. what is the difference between changing a subscript of an element or compound and changing a coefficient?

Explanation:

1. Table salt is sodium - chloride (NaCl), a compound. The periodic table lists elements, not compounds, so table salt is not on it.
2. An element has a single - atom chemical symbol (e.g., H for hydrogen). A compound has a chemical formula with multiple elements (e.g., H₂O). So, chemical symbols can help distinguish them.
3. Elements consist of one type of atom. Compounds are made of two or more different types of atoms chemically bonded.
4. Changing a subscript in a chemical formula changes the composition of the molecule. Changing a coefficient changes the number of molecules in a chemical equation.

Answer:

1. No.
2. Yes. An element has a single - atom chemical symbol, while a compound has a formula with multiple elements.
3. Elements have one type of atom; compounds have two or more different types of atoms bonded.
4. Changing a subscript changes the molecule's composition; changing a coefficient changes the number of molecules.