This is defined by a chart of elements arranged into rows and columns according to their physical and chemical properties.
What is periodic table?
100
Group 1
What are the Alkali Metals?
100
elements that have no metallic properties
What are nonmetals?
100
The number of protons in an atom of an element.
What is atomic number?
200
The ability to be pulled into thin wires.
What is ductility?
200
Columns in the periodic table.
What are groups?
200
Group 2
What is Alkaline Earth Metals?
200
The only nonmetal in group 14.
What is Carbon?
200
At room temperature, most nonmetals are in this state of matter.
What is gas?
300
The ability to reflect light.
What is luster?
300
rows in the periodic table
What are periods?
300
They have great strength, high melting/boiling points, high densities, and are less reactive than other metals.
What are transition elements (or transition metals)?
300
The Noble Gases
What are the Group 18 elements called?
300
96% of the mass of the human body is made up of these 4 nonmetals.
What are oxygen, nitrogen, carbon, and hydrogen?
400
The ability to be hammered or rolled into thin sheets.
What is malleability?
400
This scientist arranged his periodic table by increasing atomic masses.
Who is Mosely?
400
Helium, Neon, Argon, Krypton, Xenon, and Radon
What are the Noble Gases?
400
This group of nonmetals are found in nature only as compounds.
What are halogens?
400
This conducts electricity, but not as well as a metal does.
What is a semiconductor?
500
an element that has the physical and chemical properties of both metals and nonmetals
What is a metalloid?
500
because they weren't discovered until after Mendeleev's created his table.
Why weren't the Noble Gases included on Mendeleev's periodic table?
500
This group is very reactive, but not the most reactive, has low density, but not the lowest, and always is found in nature in compounds--NEVER as just elements.
What are the alkaline earth metals?
500
In its liquid form, this element conducts electricity like a metal. It is very reactive like an alkali metal. Like some nonmetals, it is a gas at room temperature. Under the conditions found on Earth, it acts as a nonmetal.
What is hydrogen?
500
They both conduct electricity at high temperatures.