Question

30 multiple choice 1 point which of the following is a characteristic of nonmetals? forms positively charged ions good conductor of heat and electricity shiny brittle clear my selection

Explanation:

To determine the characteristic of nonmetals, we analyze each option:

• "Forms positively charged ions": Metals typically lose electrons to form positive ions; nonmetals often gain electrons to form negative ions. So this is not a nonmetal characteristic.
• "Good conductor of heat and electricity": Metals are good conductors, while nonmetals are generally poor conductors (insulators or semiconductors in some cases like graphite, but overall this is a metal property).
• "Shiny": Metals have a metallic luster (shiny appearance), nonmetals are usually dull (except for some like iodine crystals, but shiny is a metal - like property).
• "Brittle": Nonmetals are often brittle (e.g., sulfur, phosphorus). They are not malleable or ductile like metals.

Answer:

D. brittle