CBA2 Review

Elements that are mostly shiny, silver or gray in color, malleable, ductile, and good conductors of heat and electricity are referred to as _______________.

• Metals

• Nonmetals

• Metalloids

• Conductor

Answer explanation

Elements that are shiny, malleable, ductile, and good conductors of heat and electricity are classified as metals. Nonmetals and metalloids do not share all these properties, making 'metals' the correct choice.

A(n) _______________ is a material that allows electricity and heat to pass through it easily.

• Ductility

• Nonmetals

• Conductor

• Insulator

Answer explanation

A conductor is a material that allows electricity and heat to flow through it easily, unlike insulators which resist such flow. Nonmetals generally do not conduct well, and ductility refers to a material's ability to deform under stress.

Chlorine (Cl) is a yellow-green gas at room temperature. Based only on this information, where would you expect to find this element on the Periodic Table?

• Left side

• Right side

• At the top

• At the bottom

Answer explanation

Chlorine (Cl) is a nonmetal and a gas at room temperature, which typically places it on the right side of the Periodic Table, where nonmetals are located. Therefore, the correct answer is the right side.

Which of the following elements could be the possible identity of Mystery Element 2?

• Aluminum (Metal)

• Fluorine (Non-Metal)

• Germanium (Metalloid)

• none

Answer explanation

Germanium is a metalloid, which means it has properties of both metals and non-metals. This makes it a suitable candidate for Mystery Element 2, unlike aluminum (metal) and fluorine (non-metal), which do not fit the criteria.

Which of the following elements could be the possible identity of Mystery Element 1?

• Magnesium (Metal)

• Carbon (Non-Metal)

• Boron (Metalloid)

• none

Answer explanation

Mystery Element 1 is identified as Carbon (Non-Metal) because it is the only non-metal option listed. Magnesium is a metal, and Boron is a metalloid, making Carbon the correct choice.

Which element is a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium

Answer explanation

Polonium is classified as a metalloid due to its properties that are intermediate between metals and nonmetals. The other options—Titanium, Selenium, and Potassium—are not metalloids.

Which elements are found on the right side of The Periodic Table?

• Metals

• Nonmetals

• Metalloids

• Water

Answer explanation

The right side of the Periodic Table primarily contains nonmetals, which include elements like oxygen and nitrogen. These elements are characterized by their lack of metallic properties, unlike metals found on the left.

How do metals differ from nonmetals?

• metals are shiny, nonmetals are dull

• metals are good insulators, nonmetals are good conductors

• metals are powdery

• nonmetals are shiny

Answer explanation

Metals are typically shiny due to their ability to reflect light, while nonmetals are usually dull in appearance. This key difference helps distinguish between the two categories of elements.

When an object changes shape when struck by a hammer it is said to be...

• luster

• malleable

• brittle

• ductile

Answer explanation

When an object is struck by a hammer and changes shape without breaking, it is described as malleable. This property allows materials, like metals, to be shaped or formed under stress, unlike brittle materials that shatter.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-1

Metalloids _____________

• have no properties of metals.

• have no properties of nonmetals.

• have some properties of both metals and nonmetals.

• none of the above

Answer explanation

Metalloids possess characteristics of both metals and nonmetals, such as being semiconductors. This unique combination allows them to exhibit properties of both categories, making the correct choice: 'have some properties of both metals and nonmetals.'