Answers GA-GSE Physical Science AMetalloids

Metalloids — Unit test Answers

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The table shows columns that Brenda uses for her notes on the properties of elements. Her notes state that some elements can react to form basic compounds.Where should Brenda place this property in her table?

only in the column for metalloids

only in the column for nonmetals

in the columns for metalloids and for nonmetals

in the columns for metals and for metalloids

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Which metalloid has three valence electrons?

boron

arsenic

silicon

lithium

For metalloids on the periodic table, how do the group number and the period number relate?

The lower the group number, the lower the period numbers, so the metalloids are found in a diagonal moving down from left to right.

The lower the group number, the higher the period numbers, so the metalloids are found in a diagonal moving up from left to right.

The higher the group number, the lower the period numbers, so the metalloids are found in a diagonal moving down from left to right.

The higher the group number, the higher the period numbers, so the metalloids are found in a diagonal moving up from left to right.

The table shows columns that Franklin uses to organize his notes on the properties of elements. His notes state that some elements are widely used in semiconductors.Where should Franklin place this property in his table?

only in the column for metalloids

only in the column for nonmetals

in the columns for metalloids and for nonmetals

in the columns for metals and for metalloids

Based on their locations on the periodic table, which best compares the properties of the metalloids arsenic (As) and antimony (Sb)?

Arsenic has a more metallic behavior than antimony because arsenic’s atoms have fewer electron shells.

Arsenic has a more metallic behavior than antimony because arsenic’s atoms have more electron shells.

Arsenic has a more nonmetallic behavior than antimony because arsenic’s atoms have more electron shells.

Arsenic has a more nonmetallic behavior than antimony because arsenic’s atoms have fewer electron shells.

Solar panels convert light energy from sunlight into electrical energy. What material is most likely used in solar panels, and why?

A nonmetal is used because it is a semiconductor and can become more conductive when more light shines on it.

A metalloid is used because it is a good conductor but can become less conductive when more light shines on it.

A metalloid is used because it is a semiconductor and can become more conductive when more light shines on it.

A nonmetal is used because it is a poor conductor but can become more conductive when more light shines on it.

How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?

They have one or two valence electrons, so they cannot lose electrons easily.

They have one or two valence electrons, so they can lose or gain electrons.

They have three to six valence electrons, so they cannot lose electrons easily.

They have three to six valence electrons, so they can lose or gain electrons.

Which lists the elements in order from least conductive to most conductive?

nitrogen (N), antimony (Sb), bismuth (Bi)

nitrogen (N), bismuth (Bi), antimony (Sb)

antimony (Sb), nitrogen (N), bismuth (Bi)

bismuth (Bi), antimony (Sb), nitrogen (N)

Which groups on the periodic table contain metalloids?

Groups 1–2

Groups 3–12

Groups 13–16

Groups 17–18

Which element is a metalloid?

selenium (Se)

germanium (Ge)

phosphorus (P)

iodine (I)

Which element is a semiconductor?

germanium

aluminum

tin

iodine

For metalloids on the periodic table, how do the group number and the period number relate?

The lower the group number, the lower the period numbers, so the metalloids are found in a diagonal moving down from left to right.

The lower the group number, the higher the period numbers, so the metalloids are found in a diagonal moving up from left to right.

The higher the group number, the lower the period numbers, so the metalloids are found in a diagonal moving down from left to right.

The higher the group number, the higher the period numbers, so the metalloids are found in a diagonal moving up from left to right.

only in the column for metalloids

only in the column for nonmetals

in the columns for metalloids and for nonmetals

in the columns for metals and for metalloids

The design of a new computer processor requires that electric current be carefully controlled. Why might an engineer want to use a metalloid when designing a new computer processor?

Metalloids are amphoteric.

Metalloids are semiconductors.

Metalloids are brittle.

Metalloids are shiny.

Which element is a metalloid?

selenium (Se)

germanium (Ge)

phosphorus (P)

iodine (I)

Which property do metalloids share with nonmetals?

Both are gases at room temperature.

Both can react to form acidic compounds.

Both are very poor electrical conductors.

Both can be pounded into thin sheets.

Which statement describes a property that is unique to metalloids?

Metalloids are shiny.

Metalloids are semiconductive.

Metalloids are solid.

Metalloids are brittle.

Which element in period 3 on the periodic table is a metalloid?

magnesium (Mg)

aluminum (Al)

silicon (Si)

sulfur (S)

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Metalloids — Unit test Answers

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