It's the smallest particle of an element that retains all the properties of that element; it is composed of electrons, protons, and neutrons.
What is an atom?
100
They are 1, 2, 3, 4, 5, 6, and 7.
What are the (Electron) Energy Levels in an atom?
100
They are SHAPES that describe the probable distribution of electron pairs in energy sub-levels.
What are ORBITALS?
100
A horizontal row of elements in the Periodic Table, that represents the highest energy level of the electrons in the element.
What is a Period?
100
The last name of the scientist who developed a scientific model, called The Lewis Structure, that visually represents an atom's Valence Electrons.
What is Lewis?
200
It is a unit of energy, having no mass, that is emitted when an electron drops from a higher-energy orbit, to a lower-energy orbit.
What is a photon?
200
A member of the Halogen Family.
What is Fluorine, Chlorine, Bromine, Iodine, or Astatine?
200
It is the electron "arrangement" in an atom.
What is Electron Configuration?
200
The elements from this family, or group, are used to abbreviate electron configuration notation.
What is the Noble Gas Family?
200
The "arrangement" of electrons in an atom.
What is electron configuration?
300
He proposed an idea that electrons traveled as waves, and multiples of waves, explaining the quantized (fixed energy) emitting/absorbing nature of electrons.
Who is De Broglie?
300
s, p, d, and f.
What are the Energy Sub-levels in an atom?
300
The most stable, lowest energy configuration of electrons in an atom.
What is ground-state electron configuration?
300
Clearly shows the order in which the orbitals are filled by electrons.
What is the Electron Energy Level and Sub-Level Diagram?
300
The components/sub-particles of the atom that determines the chemical reactivity of the atom.
What are valence electrons?
400
A principle stating that it is fundamentally impossible to know precisely both the velocity and the position of a particle, at the same time, because photons impacting particles will affect their velocity and position.
What is the Heisenberg Uncertainty Principle?
400
They are spherical orbitals, and their spherical size increases with increasing principal quantum number/ principal energy level.
What are s orbitals?
400
A principle stating that each electron occupies the lowest energy orbital available.
What is the Aufbau Principle?
400
The ELECTRONS in the atom's outer-most orbitals, generally associated with the atom's highest principal energy level, THAT DETERMINE THE CHEMICAL PROPERTIES OF THE ELEMENT.
What are Valence Electrons?
400
It increases from left to right in the Periodic Table.
What is atomic number, "+" positive charge, electron affinity, electronegativity, and/or ionization energy?
500
Three-dimensional regions around the nucleus, "fuzzy clouds," that describe the electron's probable location within a 90% probability/ chance.
What are electron orbitals?
500
A MAXIMUM of TWO are allowed, per orbital shape.
What are electrons?
500
A principle stating that a maximum of two electrons can occupy a single atomic orbital, but only if the electrons have opposite spins.
What is The Pauli Exclusion Principle?
500
A scientific model of the atoms, in the form of structures, that visually represent the valence electrons.
What are Lewis Structures (Or Electron-Dot Structures)?
500
It decreases from left to right on the Periodic Table.