What are the properties that distinguish Nonmetals on the Periodic Table from other types of elements?

Which is the correct way to handle this lab safety hazard: A drink is sitting on the lab bench next to a computer.    

A researcher combines three liquid samples with the volumes listed below. How much total liquid in liters does the researcher have?  Sample 1: 250 mLSample 2: 1.4 LSample 3: 30.00 fluid ounces

Luke recently moved to a new apartment and wants to grow houseplants but isn’t sure which room will be the best fit for them. Apply your knowledge of the scientific method to recommend a strategy for Luke to follow when determining the ideal location for houseplants in his new apartment.  Which of these steps would be classified as Data Analysis?

Convert 218.4 g to kg

Recall the Lab Safety assignment that you completed last week.  Which of these were listed as correct substitutions for a fire extinguisher in your chemistry lab area?

Which is the correct way to handle this lab safety hazard: A scientist is directly smelling a chemical from an Erlenmeyer flask.    

Which is the correct way to handle this lab safety hazard: A container of flammable liquid has spilled and been left on the lab bench next to open flames.    

You have struck it rich and found a giant gold nugget in a stream while you were on vacation in Montana.  The volume of the gold idol is approximately 1.0 L. The density of gold is 19.3 g/mL and the density of sand is 2.3 g/mL. You want to determine if it is really pure gold. You weigh the nugget and measures the volume by a water displacement method. The results are:  mass = 16.5 kg and volume of water displaced = 954 mL. Is your gold made of pure gold? 

What are the properties that distinguish Metalloids on the Periodic Table from other types of elements?