•what will happen if you scratch something softer with the quartz?

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• what will happen if you scratch something harder with the quartz?

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i really need fast if you can answer the questions right you will get 10 points

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?