Chemistry Final
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| There are ___ atoms in a mole of Mg. | 6.02 * 10^23
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| The simplest ratio of atoms among the elements represents the compound's ____ | Empirical formula.
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| Give an example of a molecular formula for C3H6O | C6H12O2
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| 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.
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| A compound made of a metal/nonmetal is? | Ionic
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| A compound made of two different nonmetals is? | Molecular
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| 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.
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| What two things do the coefficients in a balanced chemical reaction mean? | Number of molecule and number of moles
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| 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").
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| What is mass number equal to? | Protons + neutrons.
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| Define electronegativity | An atom's ability to attract bonded electrons.
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| Define ionization energy. | The ease in removing electrons.
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| What information do we get from electron configurations? | How many total electrons and what element
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Created by:
leeannaburns
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