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12 Cards in this Set
- Front
- Back
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What is the most direct and accurate means for determining atomic and molecular weights?
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mass spectrometer
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What is a mass spectrum?
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the intensity of the detector signal vs. particle atomic mass
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True or False: The periodic table is the most significant tool that chemists use for organizing and remembering chemical facts.
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True!
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True or False: Each element is unique and shares no similarites between each other.
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False. Ex. Li, Na, and K are soft reactive metals
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What do the corresponding rows and columns in the period table represent?
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the rows are ordered by atomic number, and the columns are assembled by similar properties
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What are the horizontal rows in the periodic table called?
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periods
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What are the columns in the periodic table called?
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groups
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True or False: Elements that belong to the same group often exhibit similarities in physical and chemical properties.
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True.
Ex: "coinage" metals |
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Why are elements placed in a group on the periodic table? What similar characteristic do they have?
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They have the same arrangement of electrons that the periphery of their atoms
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What type of elements are on the left and middle of the periodic table?
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metallic elements, or metals
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What type of elements are the diagonal line that start from boron to astatine?
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metalloids
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What are the elements that lie to the right of the diagonal on the period table?
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nonmetals
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