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12 Cards in this Set
- Front
- Back
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How many periods does the modern periodic table have?
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it has 7.
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An element that is shiny and conducts electricity is likely to be a?
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metal.
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What is the octet rule?
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atoms that will gain or share electrons in order to achieve a full set of 8 valence electrons.
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What do all nonmetals have in common?
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they dont conduct electricity.
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What is a cation?
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a cation is atoms that lose electrons.
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How many meters are in a hectometer?
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there are 100 meters.
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Who is credited with first arranging the elements the way they are now arranged on the periodic table?
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the person was Mandeleev
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Use your periodic table to look up the atomic number and atomic mass of Boron. How many protons does Boron have?
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boron has 5 protons.
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Which of the following elements is a metalloid?
a. copper b. indium c. silicon d. carbon |
silicon is a metalloid.
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Which class on the periodic table shares properties with both metals and nonmetals?
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they are solid.
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The most reactive metals, which are soft and silvery-white are the:
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Transition metals.
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Using your periodic table and your knowledge of the relationship between period and number of electron energy levels, how many energy levels does strontium have?
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it has 3 energy levels.
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