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Find the appropriate answer to the following:- 1. A substance that can be separated into two or more substances only by a chemical change is a(n) _____. solution/ element/ mixture/ compound 2. Which of the following materials is a substance? air/gasoline/ stainless steel/ silver 3. The first figure in a properly written chemical symbol always is _____. boldfaced/ capitalized/ italicized/ underlined 4. Which of the following represents a compound? H/ H-3/ H2O/ O-16 5. What do chemical symbols and formulas represent, respectively? elements and compounds/ atoms and mixtures/ compounds and mixtures/ elements and ions

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taskmasters
The answer for the first item is solution. A substance that can be separated into two or more substances only by a chemical change is a solution. For the second question, I think the correct answer is silver. Silver is the substance. For the third question, i think the correct answer is boldfaced. For the fourth item, the answer is H2O. Lastly, the answer for number 5 is elements and compounds. 
diamondself77

1. d

2.d

3.b

4.c

5.a

lesson 4 unit 2 elements and compounnds

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