Metalloids – Flashcards
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Which properties are characteristic of metalloids?
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intermediate conductivity and a high melting point
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Which property do metalloids share with nonmetals?
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Both are brittle.
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Which property do metalloids share with nonmetals?
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Both can react to form acidic compounds.
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The table shows columns that Brenda uses for her notes on the properties of elements. Her notes state that some elements can react to form basic compounds. Where should Brenda place this property in her table?
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in the columns for metals and for metalloids
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The table shows columns that Franklin uses to organize his notes on the properties of elements. His notes state that some elements are widely used in semiconductors. Where should Franklin place this property in his table?
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only in the column for metalloids
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Which statements describe properties that are unique to metalloids? Check all that apply.
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Metalloids are semiconductive.
Metalloids are amphoteric.
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Which groups on the periodic table contain metalloids?
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Groups 13-16
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Which element in period 3 on the periodic table is a metalloid?
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silicon (Si)
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For metalloids on the periodic table, how do the group number and the period number relate?
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The lower the group number, the lower the period numbers, so the metalloids are found in a diagonal moving down from left to right.
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Based on their locations on the periodic table, which best compares the properties of the metalloids arsenic (As) and antimony (Sb)?
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Arsenic has a more nonmetallic behavior than antimony because arsenic's atoms have fewer electron shells.
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Which lists only metalloids?
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boron (B), germanium (Ge), and tellurium (Te)
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Which element is a metalloid? Check all that apply.
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polonium (Po)
silicon (Si)
antimony (Sb)
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The metalloid that has three valence electrons is .
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boron
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The metalloid that has five valence electrons in the fourth electron shell is .
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arsenic
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How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?
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They have three to six valence electrons, so they can lose or gain electrons.
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The atoms of a metalloid have 6 valence electrons. The metalloid is used as a semiconductor. Which best describes the electron shell in which the valence electrons are located?
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The electron shell should be small so that electrons are more easily gained.
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Which lists the elements in order from most conductive to least conductive?
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potassium (K), germanium (Ge), selenium (Se)
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Which lists the elements in order from least conductive to most conductive?
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nitrogen (N), antimony (Sb), bismuth (Bi)
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Solar panels convert light energy from sunlight into electrical energy. What material is most likely used in solar panels, and why?
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A metalloid is used because it is a semiconductor and can become more conductive when more light shines on it.
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The design of a new computer processor requires that electric current be carefully controlled. Why might an engineer want to use a metalloid when designing a new computer processor?
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Metalloids are semiconductors.
