Element Organization
The original periodic table was organized in order of increasing what?
Atomic Mass
All elements in this category of elements are considered radioactive.
Actinides
A predictable change in a particular direction on the periodic table is called a:
Periodic trend
True or False? Identical twins have identical finger prints.
False
How many elements were on the periodic table when Dimitri Mendeleev first created it?
63
The elements in this group are rarely found in nature in their pure form due to having the highest reactivity.
Group 1: Alkali Metals
This element does is in its own category due to having only one proton and one electron.
Hydrogen
The energy required to remove an electron from an element; _________ as you move down.
Ionization Energy; decreases
Most particles have to flow through a "medium" of some sort, except for light particles--which are called:
Currently, the elements on the periodic table are organized in order of increasing what?
Atomic number
Group 17: Halogens
Considered a noble gas despite not having 8 valence electrons.
Helium
Atomic radius; increases
Mrs. Meusch's middle name
Nicole
eight
These elements are chemically inert due to having a stable electron configuration of 8 valence electrons.
Group 18: Noble Gases
The number of elements NOT considered to be metals:
24
The ability of an atom to attract electrons; _______ as you move across.
Electronegativity; increases
Changes shape (forms new paths; neuroplasticity)
Elements within the same group have the same number of ___________.
Valence Electrons
These metals do not always follow all of the other rules of chemistry due to having only partially filled d-orbitals.
Transition Metals
Most common element in the entire universe
Hydrogen
The number of the "row" that elements are in indicates the number of ____________________ that atom has.
Energy Levels
Mrs. Meusch's pet pig's name
Vernon