Trends
Atomic radius _____ along a Period as the atomic number increases (left to right)
decreases
Where are metals located?
Located to the left of the periodic table
Where are metalloids located?
Along the "ladder" of the periodic table
Where are nonmetals located?
What does malleable mean?
describes a solid that is easily hammered and flattened into a thin sheet
Atomic radius _____ down a Group
increases
Metals tend to have ______ electronegativity values because they do not attract electrons easily
low
Metalloids tend to have the properties of ______
metals and nonmetals
Nonmetals tend to have _____ electronegativity values because they attract and gain electrons easily
high
What does conductivity mean?
describes the ability of heat or electricity to flow through a substance
Ionization energy generally ______ along a Period and ______ down a Group
Metals tend to have _______ ionization energy values
low
Metalloids exist only as _____ at room temperature
Nonmetals tend to have _____ ionization energy
high
What is atomic radius?
Describes the size of the atom of an element
What is electronegativity?
the ability of an atom to attract electrons
What group is the alkali metals?
Group 1
Which elements "touch the ladder" on the periodic table but are NOT considered metalloids?
Al and Po
Hydrogen is a _______ (metal, nonmetal, or metalloid)
nonmetal
Elements in the same Group have same ______
number of valence electrons
What is ionization energy?
the energy required to remove an electron from the outermost shell of an atom
What group is the alkaline earth metals?
Group 2
Metalloids properties are more like those of _____ and less like those of _______
metals & nonmetals
_______ is the only liquid nonmetal
Br
Elements in the same Period have the same _______
Number of energy shells