Vocabulary
The ability to conduct heat and electricity
Conductivity
This is defined by a chart of elements arranged into rows and columns according to their physical and chemical properties.
Periodic table
Group 1
Alkali Metals
elements that have no metallic properties
nonmetals
The number of protons in an atom of an element.
The atomic number
The ability to be pulled into thin wires.
Ductility
Columns in the periodic table are called
Groups
Group 2
Alkaline Earth Metals
The only nonmetal in group 14.
Carbon
At room temperature, most nonmetals are in this state of matter.
gas
The ability to reflect light.
Luster
Rows in the periodic table are called
periods
They have great strength, high melting/boiling points, high densities, and are less reactive than other metals.
Transition elements (or transition metals)
The Noble Gases
Group 18 elements
96% of the mass of the human body is made up of these 4 nonmetals.
oxygen, nitrogen, carbon, and hydrogen
The ability to be hammered or rolled into thin sheets.
Malleability
Periodic table increases in its _______ as it moves across the table.
Atomic mass
Helium, Neon, Argon, Krypton, Xenon, and Radon
Noble Gases
This group of nonmetals are found in nature only as compounds.
halogens
This conducts electricity, but not as well as a metal does.
semiconductor
An element that has the physical and chemical properties of both metals and nonmetals
Metalloid
They weren't discovered until after Mendeleev's created his table.
Noble Gases
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.
Alkaline earth metals
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.
hydrogen
They both conduct electricity at high temperatures.
metalloids & nonmetals