Lab 7 copy - Compounds and Their Formulas Pre-lab Study...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Compounds and Their Formulas Pre-lab Study Questions 1. Where are the valence electrons in an atom? In the last shell of an atom 2. How specifically are positive and negative ions formed? When a metal combines with a nonmetal the metal loses electrons to make a positive ion and the nonmetal gains electrons forming a negative ion 3. How do subscripts represent the charge balance of ions? Subscripts represent the a,punt of ions needed 4. Why are electrons shared in covalent compounds? In order to achieve octets 5. How do the names of covalent compounds differ from the names of ionic compounds? Covalent bonds are named by using prefixes that give the number of atoms of each element in the compound. Ionic computes are named by replacing the ending of the nonmetal with ite or ate. 6. What are polyatomic ions? A group of atoms with an overall charge. B. Ionic Compounds and Formulas B.1 Physical Properties Given the compound, NaCl, look in a book or online and describe its appearance and list its density and melting point. It 's appearance is colorless crystals. Density – 2.165g/cm3 Melting point – 801C, 1074K, 1474F B.2 Formulas of Ionic Compounds: Fill in the table below Name Positive ion Negative ion Formula Sodium chloride Na + Cl -  NaCl Magnesium chloride Mg 2+ Cl- MgCl2 Calcium oxide Ca 2+ O 2- CaO Lithium phosphide Li+. P 3- Li3P
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern