Electron & Noble Gas Configuration
How many electrons are in each orbital?
2
This principle states that electrons fill orbitals starting with the lowest energy levels first.
What is the Aufbau principle?
These elements, found in Group 18, are known for being inert and having a full outer electron shell
What are noble gases?
These elements are good conductors of heat and electricity, malleable, and ductile.
What are metals?
He arranged his table of elements with gaps and use the patterns around them to predict the properties of these unknown elements
Dmitri Mendeleev
The electron configuration for sulfur (S) is this
1s22s22p63s23p4
This rule states that electrons fill orbitals singly before pairing up
What is Hund's rule?
his group of elements is highly reactive and includes fluorine, chlorine, and bromine.
What are halogens?
Nonmetals are generally poor conductors of electricity and often exist in these two states at room temperature.
What are gases and solids?
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties
What is Periodic Law?
The noble gas configuration for bromine (Br) is written as this.
What is [Ar]4s23d104p5
The total number of valence electrons in a nitrogen atom
What is 5?
The atomic radius decreases across a period because of this trend in nuclear charge.
What is an increasing number of protons?
The majority of elements on the periodic table belong to this category.
What are metals?
These elements, often called rare earth metals, belong to the f-block and are known for their role in making strong magnets and phosphors.
What are lanthanides?
This element has the noble gas configuration [Kr]5s24d105p3
What is antimony (Sb)?
This principle explains why no two electrons in the same atom can have identical quantum numbers
What is the Pauli exclusion principle?
These elements, found in Group 1, are soft, reactive metals that readily lose one electron to form a +1 charge.
What are alkali metals?
Metals tend to lose electrons in chemical reactions, forming these types of charged particles.
What are cations?
How many orientations can the p subshell have?
What is three?
For an oxygen (O) ion with a -2 charge, this is its electron configuration
What is 1s22s22p6
This model states that electrons orbit the atom in random ways and pictures the atom as being surrounded by an electron cloud containing all the possible places that the electron might be
Quantum Mechanical Model
This trend, defined as the energy required to remove an electron, generally increases across a period and decreases down a group.
What is ionization energy?
This property, commonly associated with metals, describes their ability to reflect light.
What is luster?
this describes the shape of the electron's orbital within an energy level
What is the angular momentum quantum number?