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Chemical Families and Reactivity Patterns
Worksheet
Grade Level
Chemistry
11.21 Chemical Families and Reactivity Patterns
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Use the property table for four unknown elements. Which unknown is most likely a metalloid?
A
Unknown P: soft metal, one valence electron, vigorous reaction with water
B
Unknown Q: brittle solid, moderate conductivity, located near the stair-step, forms covalent network solids
C
Unknown R: colorless monatomic gas, filled valence shell, very low reactivity
D
Unknown S: diatomic nonmetal, seven valence electrons, displaces iodide
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