Metals
These elements are usually shiny and good conductors of heat and electricity.
Metals
Elements that are generally poor conductors of heat and electricity are called these.
Nonmetals
These are a group of elements found in the two rows commonly displayed below the main periodic table.
Rare earth metals
Bubbles forming during a reaction can be evidence of the production of this.
Gas
If two substances react and bubbles appear, this may indicate that a new substance is forming
Gas
Copper is used in electrical wires because it is able to __________ electricty
Conduct
This classification of elements has properties of both metals and nonmetals.
Metalloids
Rare Earth elements are important to this part of modern life because they are used in many electronic devices.
Technology
A reaction that causes something to become hotter or colder shows a change in this.
A student mixes two substances and notices the container gets warmer. This is evidence of a change in this
Thermal Energy
This is a chart that shows all the elements in the universe
Silicon is commonly classified as this because it has properties between those of metals and nonmetals.
Metalloids
Rare Earth metals are generally this type of element: metal, nonmetal, or metalloid.
Metals
A change from one color to another during a reaction can be evidence of this
Two clear liquids are mixed and a solid suddenly appears. What evidence of chemical change has occurred?
Precipitate
This property allows many metals to be hammered or shaped without breaking.
Malleability
An element that is dull and a poor conductor is most likely in this classification.
Nonmetals
Rare Earth metals are generally good conductors of this
Electricity
When an insoluble solid forms during a reaction, that solid is called this
Precipitate
A clear liquid changes from blue to yellow after two substances are mixed. This observation can be evidence of what?
Unexpected color change
This property is when elements reflects light well
Luster
If an element has some properties of metals and some properties of nonmetals, scientists would classify it as this.
Metalloid
This category of elements is especially important in many modern technologies because of their useful physical properties
Rare Earth Elements
Gas production, a thermal energy change, a precipitate, and a color change can all be evidence of this
Chemical Change
A student mixes two liquids. The mixture changes color, becomes warm, and produces a solid. What do these observations suggest?
Unexpected Color change
Unexpected temp change
Precipitate