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30 Cards in this Set

  • Front
  • Back
Atomic Number
A count of the number of protons in the atomic nucleus
Atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons
Law of Definite Proportions
A law stating that elements combine in definite mass ratios to form compounds
Law of Conservation of Mass
A law stating that matter is neither created nor destroyed in a chemical reaction
Cathode Ray Tube
A device that emits a beam of electrons
An electrically neutral subatomic particle of the atomic nucleus
A medieval endeavor concerned with turning other metals to gold
Atomic Mass
The number of nucleons (protons and neutrons) in the atomic nucleus. Used primarily to identify isotopes.
Mass Number
The mass of an element's atoms, listed in the periodic table as an average value based on the relative abundance of the element's isotopes.
A positively charged subatomic particle of the atomic nucleus
atomic Nucleus
The dense, positively charged center of every atom
An extremely small, negatively charged subatomic particle found outside the atomic nucleus
Subatomic Particle
Particles such as protons, neutrons, and electrons that are smaller than an atom.
The smallest particle of an element that retains the chemical identity of the element
A convenient, yet non-SI unit of length used to express atomic dimensions.
A horizontal row in the periodic table
A vertical column in the periodic table, also known as a family of elements
Periodic Table
A chart in which all known elements are organized by physical and chmeical properties
An element that is shiny, opaque, and able to conduct electricity and heat
An element that is located toward the upper right of the periodic table
An element that exhibits some properties of metals and some properties of nonmetals
A group of atoms held tightly togeather by covalent bonds
Diatomic molecule
A molecule that contains two atoms.
Molecular Forumla
A chemical formula that indicates the actual number of atoms of each element in one molecule of a substance.
empirical Formula
A chemical formula that shows the kinds of atoms that their relative numbers in a substance in the smalles possible whole-number ratios.
Structural Formula
A formula that shows not only the number and kinds of atoms in the lolecule but also the arrangement (connections) of the atoms.
Positively charged ions
Negatively charged ions
Hydrocarbons in which each carbon atom is attached to four other atoms
Organic Chemistry
The study of compounds that contain carbon.