Elements and Their Properties

An Allotrope of carbon that is soft and can be used as a lubricant.

• Silicoln

• Sand

• Diamond

• Graphite

The process by which a solid changes to a gas without becoming a liquid.

• Condensation

• Sublimation

• ionization

• Evaporation

In its gaseous state, _____________ forms diatomic covalent molecules.

• Halogens

• Alkali Metals

• Noble Gasses

• Rare earth metals

When hydrogen reacts with the active metals, it ____________.

• shares electrons

• gains one electron

• loses one electron

• loses two electrons

Different forms of the same element with different properties and different atomic arrangement,

• allotropes

• carbons

• silicons

• Graphites

At room temperature, most metals are

• Solid

• Liquid

• Gas

• Radioactive

An alatrope of carbon that is hard and often used in jewelry

• Silver

• Diamond

• Obsidian

• Quartz

Metals can be used as wire because they are

• Shiny

• Alloyed

• Maleable

• Ductile

The __________ often occur in nature as uncombined elements.

• Alkaline earth metals

• Alkali metals

• Actinide series

• Transition elements

Substances that conduct electricity only under certain circumstances are most likely to be

• Metals

• Nonmetals

• Metaloids

• Noble Gases