the physical and chemical properties of the elements are periodic functions of their atomic numbers
an arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column
lanthanides or rare earth elements
the 14 elements with atomic numbers 58-71
the 14 elements with atomic numbers 90-103
the elements of group1 of the periodic table
the elements in group 2 of the periodic table
the d-block elements; all with typical metallic properties
main group elements
the p-block and s-block elements
elements in group 17; most reactive of the nonmetals
1/2 the distance between the nuclei of identical atoms joined in a molecule
an atom or group of atoms that has a positive or negative charge
any process that results in the formation of an ion
the energy required to remove one electron from an atom of an element
the energy change that occurs when an electron is acquired by a neutral atom
a positive ion
a negative ion
the electrons available to be lost, gained, or shared in the formation of chemical compounds
a measure of the ability of an atom in a chemical compound to attract electrons
Who presented a method for measuring atomic mass?
when was the first periodic table published?
How was the first periodic table arranged?
according to increasing atomic weight
Who discovered a method for determining the positive nature of the atomic nucleus?
Because of Moseleys work, the periodic table was rearranged according to what?
the atomic number
When arranged by atomic number, elements with similar properties fall in the same ______.
Where was Helium discovered on earth?
______ is the most abundant of the noble gases.
group 17 elements with their outer shell filled
f-block elements are similar in ______ & _________.
appearance & properties
what elements are noble gases?
Helium, Neon, Argon, Krypton, Xenon, and Radon
groups can also be called what?
Group 1 elements (notation)
Group 2 elements (notation)
the alkali metals react with nonmetals to make what?
alkali metals (properties)
soft, silvery, & have a low density, highly reactive
alkaline metals (properties)
harder, denser, stronger, higher melting point, & less reactive than group 1 elements
has an electon configuration of 1s1; not a metal but a gas
the d-block elements are all what?
d-block elements (properties)
have a luster, harder and denser than s-block elements (except Hg)
Which 3 metals are the least reactive of the metals?
Pd, Fe, and Au
what are the 3 least reactive metals called?
the noble metals
What element is used in lightbulbs?
What element is used for wiring?
What elements are used in making jewelry?
Ag, Au, and Pt
what are the 6 metalloids?
B, Si, Ge, As, Sb, and Te
What are the 8 p-block metals?
Al, Ga, In, Sn, Tl, Pb, Bi, Po
all shiny, reactive metals
radioactive and unstable
How ionization energy measured?
periodic trends (ion. energy)
from left to right, periods tend to increase in ion. energy because of an increase in the nuclear charge
group trends (ion. energy)
from top to bottom, groups tend to decrease in ion. energy because outer energy levels are getting farther from the nucleus
removal of electrons form a _______ ion.
add electrons release energy
add elctrons gain energy
developed the idea of electronegitivity
Which 2 groups are least likely to gain electrons?
group 2 and 18
What element has the highest electronegativity?
periodic trends (electronegativity)
gradual increase from left to right
group trends (electronegativity)
decrease from top to bottom