1. What element contains 19 protons and 18 electrons?

  1. Why are noble gases not reactive?

  1. A phosphate molecule has 1 phosphorous (P) atom, 4 oxygen (O) atoms. How would you write the formula.

  1. If a chemical symbol in a chemical formula has no subscript, it means

  1. A ______uses chemical symbols and formulas as a shortcut to describe a chemical reaction.

  1. The word equation “Calcium reacts with chlorine to produce calcium chloride” would be represented by what chemical formula?

  1. In a chemical equation, the number of MOLECULES of a given substance is indicated by a

  1. In a chemical equation, the number of ATOMS of a given substance is indicated by a

  1. How can you be sure a chemical reaction is happening?

  1. How many atoms are present in the reactants in this chemical equation?
    2 Na + MgF2  2 NaF + Mg ?

  1. In chemical formulas, which is the product? Which is the reactant?

  1. In balancing a chemical equation, what are you NOT allowed to do?

  1. Why does the law of conservation of mass dictate that chemical equations be balanced?

  1. Balance 2Na + MgF2 NaF + Mg

  1. How are element arranged on the periodic table?

  1. What are some patterns on the periodic table?

  1. A atom of lithium has 3 protons and 4 neutrons. How many electrons are in the lithium atom when it is neutral?

  1. What is the approximate mass of a neutral atom with 15 electrons and 16 neutrons?

  1. How does the structure of a helium atom differ from the structure of acarbonatom?

  1. How many electrons are in each energy level (up to the fourth)

  1. What are the following, chemical symbol,coefficient,and subscript

  1. Ionic bonding occurs when

  1. When you add a proton, you get

  1. If the ending -ide is added to the name of an ion, what do we know about the ion?

  1. Carbon dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?

  1. What is true of all atoms in the same family or group.

  1. The valence shell of a neutral atom loses two valence electrons. Which of the following ions forms?

  1. What are the force that holds ionic bond together? Covalent?

  1. An beryllium ion has 4 protons, 5 neutrons, and 2 electrons. What is the charge of a beryllium ion?

  1. According to the electron-dot diagram of fluorine, how many morevalence electrons does the fluorine atom need to fill its outermost energy level?

  1. What type of bonds share electrons? Which type take electrons? What type of elements are involved in each?

  1. What varies among different isotopes of the same element?

  1. What varies among different ions of the same element?

  1. What is the primary different between two neighboring atoms on the periodic table?

  1. What is the chemical formula for the stable ionic compound form between beryllium chloride and Potassium Iodide?

  1. Balance the equation: __ HgO __ O2 __ Hg

  1. How many neutrons does Chromium-63 have?

  1. What does Mg2+ mean?

  1. How do you name ionic compounds? How do you name covalent?

  1. What are the different chemical reactions?

  1. What are the characteristics of an acid? Base?

  1. What happens during a neutralization reaction?

  1. What are cations? anions