Question

1. how would this element be classified?

a. metal
b. metalloid
c. nonmetal
d. metamorphic

1. you are trying to find a good material to use as a conductor in your circuit. you know that you need a solid malleable material that conducts electricity well. which of the following would be an appropriate choice?

a. hydrogen
b. carbon
c. iron
d. fluorine

1. silicon is a semiconductor and has properties of both metals and nonmetals. what type of element is silicon?

a. metal
b. metalloid
c. nonmetal

1. which elements are found on the right side of the periodic table?

a. metals
b. metalloids
c. nonmetals
d. water

1. which element is least likely to conduct heat and electricity?

a. o
b. po
c. si
d. ca

1. which of the given choices correctly shows the three main groups of elements listed from least conductivity to greatest conductivity?

a. metals, nonmetals, metalloids
b. metalloids, metals, nonmetals
c. nonmetals, metalloids, metals
d. nonmetals, metals, metalloids

Explanation:

1. Metals have luster, are solid (at room - temperature for most common ones), good conductors of electricity, and often have high density. The properties in the table match a metal.
2. Iron is a metal. Metals are solid (at room temperature for common ones), malleable, and good conductors of electricity. Hydrogen is a gas, carbon (in non - metallic forms like diamond or graphite - though graphite has some conductivity but not as good as metals in general) and fluorine is a gas.
3. Metalloids have properties of both metals and non - metals. Silicon is a well - known metalloid.
4. Non - metals are generally found on the right side of the periodic table. Metals are on the left and middle, metalloids are in a diagonal - like region separating metals and non - metals, and water is a compound, not an element.
5. Oxygen (\(O\)) is a non - metal. Non - metals are generally poor conductors of heat and electricity. Polonium (\(Po\)) is a metalloid (some conductivity), silicon (\(Si\)) is a metalloid (semiconductor), and calcium (\(Ca\)) is a metal (good conductor).
6. Non - metals have the least conductivity, metalloids have intermediate conductivity (semiconductors), and metals have the greatest conductivity.

Answer:

1. a. Metal
2. c. Iron
3. b. Metalloid
4. c. Nonmetals
5. a. \(O\)
6. c. Nonmetals, metalloids, metals