From The Chemistry Book
- Absorption spectra-
- Actinide
- Alkali metals- a Group 1 metals
- Alkaline earth metals-a Group 2 metal
- Angular momentum
- Atom- the fundamental unit of which elements are composed.
- Atomic mass- the weight average mass of the atoms in a naturally occurring element.
- Atomic number- the number of protons in the nucleus of an atom; each element has a unique atomic number
- Atomic theory
- Bohr model
- Bright-line spectra
- Cathode rays- the "rays" emanating from the negative electrode (cathode) in a partially evacuated tube; a stream of electrons
- Chalcogens
- Chemical properties- the ability of a substance to change to a different substance.
- Diameter
- Discrete energy levels
- Electromagnetic radiation-radiant energy that exhibits wave-like behavior and travels through space at the speed of light in a vacuum.
- Electromagnetic waves
- Electronegativity-the tendency of an atom in a molecule to attract shared electrons to itself.
- Electrons
- Element
- Emission
- Energy-the capacity to do work or to cause the flow of heat.
- Energy levels
- Family
- Frequency-the number of waves(cycles)per second that pass a given point in space.
- Halogens-Group 7 element.
- Ionization energy-the quantity of energy required to remove an electron from a gaseous atom or ion.
- Ions
- Isotopes-atoms of the same element(the same number of protons) that have different numbers of neutrons. They have identical atomic numbers but different mass numbers.
- Lanthanide
- Mass-the quantity of matter in an object.
- Metals
- Model-(theory) a set of assumptions put forth to explain the observed behavior of matter. The models of chemistry usually involve assumptions about the bahavior of individual atoms or molecules.
- Molecules
- N is the principal quantum number
- Neutrons
- Nonmetals-an element that does not exhibit metallic characteristics. Chemically, a typical nonmetal accepts electrons for a metal.
- Nucleus
- Orbital
- Periodic Table
- Periodicity
- Photoelectric effect
- Photons
- Physical
- Probabilistic nature
- Protons
- Quantum
- Quantum electron configuration
- Quantum mechanical model
- Quantum mechanics
- Quantum theory
- Radioactive
- Radius (Radii)
- Reactivity
- S p d and f subshells of quantum number
- Semimetals
- Spectral lines
- Spectrum
- Subshells
- Transactinide
- Transition metals
- Transuranium
- Trillion
- Valence electrons
- Valence shell
- Wave properties
- Wavelength
