A substance that is a good conductor of heat and electricity
What is a Metal
100
True or False: the properties of ALL metals are: they have luster, are malleable, and conduct electricity
True
100
A pure metal mixed with other metals to improve hardness and strength
What is an Alloy
100
A compound made of a metal and nonmetal
What is a Salt
100
A substance that tastes bitter and turns litmus paper green
What is a Base
200
A solid that forms in a solution during a chemical reaction
What is a Percipitate
200
The cutting edges of ________ carbide scissors are preferred over stainless steel because they cut better and need less frequent sharpening.
What is Tungsten
200
Which of the following best describes metals? (metals cannot be combined; metals are safe for humans; metals are often mixed; metals will not melt)
Metals are often mixed
200
Which process will produce a salt? (strong acids are mixed together; strong acids react with strong bases; two bases are mixed together; strong acids evaporate into the air)
Strong acids react with strong bases
200
A substance that tastes sour and turns litmus paper red
What is an Acid
300
A change where the starting substances change into a new substances
What is a Chemical Change
300
Mercury and _________ are two elements that are liquid at room temperature.
What is Bromine
300
The gradual eating away of a metal because it reacts chemically to form a compound that weakens it
What is Corrosion
300
The chemical formula for table salt is NaCl. Which of the following best describes salt? (an element; a mixture; a compound; an atom)
a compound
300
Something that changes colors to identify a substance as an acid or a base
What is an Indicator
400
All of the following are signs of a chemical reaction EXCEPT (change in color; change of shape; release of heat or light; formation of a percipitate)
What is Change of Shape
400
This lightweight and strong metal is used to build aircrafts and spacecrafts.
What is Titanium
400
A property of metal meaning that it can be drawn out in length and shaped into strands of wire.
What is Ductile
400
A scale that indicates the amount of charged hydrogen particles in a solution
What is a pH scale
400
All of the following contain an acid EXCEPT: (vinegar; orange; soap; lemon)
What is Soap
500
The most reactive metals are in this which column of the periodic table?
What is The First
500
Electrical wires are made of ________ and ________ because these elements are some of the best electrical conductors of all metals, and they are plentiful in nature.
What are Copper and Aluminum
500
Julio removes a pan from the stove. Why isn't the plastic handle hot?
Plastic is an insulator
500
Which reactant turns into a salt when bases and acids react chemically?
What are bases
500
Which of the following best describes acids? (vinegar and orange juice are weak acids; red litmus paper turns blue when put in acid; all acids are the same strength; acid solutions do not conduct electricity)