An unknown element contains 17 protons, 18 electrons, and ha…

An unknown element contains 17 protons, 18 electrons, and has a mass number of 35.  Answer the following questions (10 points):   a. What is the atomic number of this element?   b. What is the name and symbol of this element?   c. How many neutrons does it contain?   d. Is this an ion?  If so, is it a cation or an anion?   e. Write the symbolic (isotopic) notation for this element.  

The density of iron is 7.87 g/mL.  Some iron was placed into…

The density of iron is 7.87 g/mL.  Some iron was placed into a graduated cylinder containing 25.0 mL of water.  The water level rose to 37.9 mL.  Determine the mass of zinc knowing that the equation for density is d = m/V.  Please include units and the correct number of significant figures in your answer (7 points).