Chemistry Mid-term Studyguide

Orbitals of equal energy are each occupied by one electron before any is occupied by a second electron is a statement of
Hund’s rule
A 3-dimensional region around a nucleus where an electron nay be found is called a(n)
Orbital
The major difference between a 1s and a 2s orbital is that
The 2s orbital is at higher energy than the 1s orbital
The letter designation for the first 4 sublevels w/max. # of electrons that can be accommodated in each sublevel are
s:2, p:6, d:10, and f:14
Which of the following lists atomic orbitals in the correct order they’re filled in by energy?
1s2s2p3s3p4s3d4p5s4d5p6s4f5d6p7s5f6d7p
What is removed when the ionization energy is supplied to an atom of an element?
An electron
For an electron in an atom to change from the ground state to an excited state,
Energy must be absorded
How many electrons are needed to completely fill the fourth energy level?
32
How many electrons are needed to completely fill the fifth energy level?
32
Argon, Krypton, and Xenon are
Noble gases
Fluorine, Chlorine, and Iodine are
Halogens
Nobelium, Uranium, and Actinium are
Actinides
Europium, Ytterbium, Neodymium, and Lanthanum are
Lanthanides
Hydrogen, Lithium, Sodium, and Potassium are
Alkali metals
Beryllium, Calcium, and Strontium are
Alkaline Earth Metals
To which block do the actinide elements belong to
F
To which block do the lanthanide elements belong to
F
To which block both alkali metals, alkaline earth metals and Helium belong to
S
To which block do the transition metals belong to
D
To which block do the noble gases, other nonmetals, and a considerable amount of the poor metals belong to
P
Hydrogen can be placed separately from other elements on the periodic table because it
Has many unique properties
Elements in a group or column in the periodic table can be expected to have similar
Properties
No 2 electrons in the same atom can have the same 4 quantum #s. This statement is
Always true
The element having the greatest electronegativity is
Flourine
The most reactive group of nonmetals is the
Halogens
The most reactive group of metals is the
Actinides
In nature, alkali metals occur as
Compounds
Which model of the atom explains the orbitals of electrons as waves?
The Quantum Model
A horizontal row of blocks in the periodic table is called a(n)
Period
The vertical rows in the periodic table are called
Groups
The set of orbitals that are dumbbell shaped and directed along the x. y and z axes are–?–orbitals
P
Valence electrons are those s and p shaped electrons
In the highest energy level
The main energy levels of an atom are indicated by the__?__quantum #
Principle
The statement that an electron occupies the lowest available energy orbital is
Aufbau’s Principle
On the periodic table, as you move left to right in Period 4 from gallium-bromine, atomic radii
Generally Decrease
When an electron is acquired by a neutral atom, the energy change is called
Electron Affinity
The first periodic table was arranged by
Mendeleev
Today’s periodic table is arranged by
Atomic #
The electron configuration 1s2 2s2 2p6 3s2 3p1 represents which element
x

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