객관식
Which feature of Mendeleev's periodic table made his theory about the organization of matter especially powerful?
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2. Atoms & Elements
Periodic Table: Classifications
객관식
Which property do metalloids share with metals?
A
They are generally ductile.
B
They are good conductors of electricity.
C
They form basic oxides.
D
They are highly malleable.
검증된 단계별 안내1
Understand the properties of metals: Metals are generally good conductors of electricity, ductile (can be drawn into wires), malleable (can be hammered into sheets), and tend to form basic oxides.
Understand the properties of metalloids: Metalloids have properties intermediate between metals and nonmetals. They often have some metallic and some nonmetallic characteristics.
Compare the options given: 'They are generally ductile' and 'They are highly malleable' are typical metallic properties, but metalloids are usually brittle and not ductile or malleable.
'They form basic oxides' is a property of metals, but metalloids tend to form amphoteric or acidic oxides instead.
Recognize that metalloids share the property of being good conductors of electricity with metals, although their conductivity is usually less than that of metals.
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