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Chemistry Final

QuestionAnswer
There are ___ atoms in a mole of Mg. 6.02 * 10^23
The simplest ratio of atoms among the elements represents the compound's ____ Empirical formula.
Give an example of a molecular formula for C3H6O C6H12O2
When can ionic compounds, such as NaCl, conduct electricity? When the ions are free to move, so when they are dissolved in water or melted.
A compound made of a metal/nonmetal is? Ionic
A compound made of two different nonmetals is? Molecular
What must happen during a chemical change in order to make a new substance? Bonds must break in the reactants in order to form new bonds, and therefore new substances.
What two things do the coefficients in a balanced chemical reaction mean? Number of molecule and number of moles
What evidence supports the existence of a dense, small, positively charged nucleus? Gold foil experiment; positively charged particles were shot at gold foil and only some of them bounced off (debunking Thomson's "sea of negative charge").
What is mass number equal to? Protons + neutrons.
Define electronegativity An atom's ability to attract bonded electrons.
Define ionization energy. The ease in removing electrons.
What information do we get from electron configurations? How many total electrons and what element
Created by: leeannaburns