metal, nonmetal, metalloid

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

• Magnesium (Metal)

• Carbon (Non-Metal)

• Boron (Metalloid)

• none

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

• Aluminum (Metal)

• Fluorine (Non-Metal)

• Germanium (Metalloid)

• none

Which of the following elements could be the possible identity of Mystery Element 3?

• Copper (Metal)

• Nitrogen (Non-Metal)

• Germanium (Metalloid)

• none

A student is given a sample of an unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a nonmetal. He discovered that the unknown element conducted some heat and electricity, had a shiny luster, and broke easily. This element is most likely a 

• metal
• nonmetal
• metalloid
• cannot be determined

Pure sodium has luster, bends easily, and conducts electricity.  Based off these properties, it would be classified as?

• A Metal
• A non metal
• A metalloid

Fluorine is used in many tooth pastes because it helps maintain healthy teeth.  At room temperature it is gaseous, and does not conduct electricity. Based off these properties, it would be classified as?

• A metal
• A non metal
• A metalloid