Arrangement of the Periodic Table Quiz

Which statement does NOT correctly compare silicon with another element?

• Silicon is a better conductor of electricity than sulfur.

• Silicon conducts electricity as well as copper does.

• Silicon is a solid at room temperature, but argon is a gas.

• Silicon is less malleable than silver.

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112.20.b.5.C

Which TWO​ elements are nonmetals and gases at room temperature and normal atmospheric pressure?​

• Fluorine, F, and chlorine, Cl

• Boron, B, and aluminum, Al

• Hydrogen, H, and cesium, Cs

• Cobalt, Co, and nickel, Ni

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112.20.b.5.C

Which pair of properties describes the elements in Group 18?

• They are chemically stable and liquid at room temperature.

• They have eight valence electrons and are flammable.

• They are magnetic and boil at low temperatures.

• They are gaseous at room temperature and chemically stable.

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112.20.b.5.C

Match the following

• Gases; dull; poor conductors of heat and electricity; brittle

• Metals

• Have some properties of metals and some properties of non-metals

• Metalloids

• Shiny luster; good conductors of heat and electricity; ductile; malleable

• Non-metals

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112.20.b.5.C

Which element has five valence electrons?

• Helium

• Sodium

• Nitrogen

• Calcium

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112.20.b.5.C