var nc = 47, fc = new Array(nc); fc[0] = {t:"Alkali Metal",d:"An element in group 1 of the periodic table."}; fc[1] = {t:"Alkaline Earth Metal",d:"An element in group 2 of the periodic table."}; fc[2] = {t:"Alpha (α) Particle",d:"A radioactive emission with a charge of 2+ and a mass equivalent to that of a helium nucleus."}; fc[3] = {t:"Anion",d:"Negatively charged particle created when an atom or molecule gains one or more electrons."}; fc[4] = {t:"Atomic Mass Unit (amu)",d:"Unit used to express the relative masses of atoms and subatomic particles that is exactly 1/12 the mass of one atom of carbon with 6 protons and 6 neutrons in its nucleus."}; fc[5] = {t:"Atomic Number (Z)",d:"The number of protons in the nucleus of an atom."}; fc[6] = {t:"Average Atomic Mass",d:"A weighted average of masses of all isotopes of an element, calculated by multiplying the natural abundance of each isotope by its mass in atomic mass units and then summing these products."}; fc[7] = {t:"Beta (β) Decay",d:"The process by which a neutron decays into a proton and a β particle."}; fc[8] = {t:"Beta (β) Particle",d:"A radioactive emission that is a high-energy electron."}; fc[9] = {t:"Cation",d:"Positively charged particle created when an atom or molecule loses one or more electrons."}; fc[10] = {t:"Carboxylic Acid",d:"An organic compound containing the –COOH functional group."}; fc[11] = {t:"Covalent Bond",d:"A bond between two atoms created by sharing one or more pairs of electrons."}; fc[12] = {t:"Dalton (Da)",d:"A unit of mass identical to 1 atomic mass unit."}; fc[13] = {t:"Electron",d:"A subatomic particle that has a negative charge and essentially zero mass."}; fc[14] = {t:"Empirical Formula",d:"A formula showing the smallest whole-number ratio of elements in a compound."}; fc[15] = {t:"Formula Unit",d:"The smallest electrically neutral unit of an ionic compound."}; fc[16] = {t:"Functional Group",d:"A structural subunit in organic molecules that imparts characteristic chemical and physical properties."}; fc[17] = {t:"Group (or Family)",d:"All elements in the same column of the periodic table."}; fc[18] = {t:"Halogen",d:"An element in group 17 of the periodic table."}; fc[19] = {t:"Ion",d:"An atom or group of atoms that has a positive or negative charge."}; fc[20] = {t:"Ionic Compound",d:"A compound composed of positively and negatively charged ions held together by electrostatic attraction."}; fc[21] = {t:"Isotopes",d:"Atoms of an element containing the same number of protons but different numbers of neutrons."}; fc[22] = {t:"Law of Multiple Proportions",d:"The ratio of the two masses of one element that react with a given mass of another element to form two different compounds is the ratio of two small whole numbers."}; fc[23] = {t:"Main Group Elements (or Representative Elements)",d:"(also called representative elements)
The elements in groups 1, 2, and 13 through 18 of the periodic table."}; fc[24] = {t:"Mass Number (A)",d:"The number of nucleons in an atom."}; fc[25] = {t:"Metalloids (or Semimetals)",d:"Elements along the border of the periodic table between metals and nonmetals; they have some metallic and some nonmetallic properties."}; fc[26] = {t:"Metals",d:"The elements on the left side of the periodic table that are typically shiny solids that conduct heat and electricity well and are malleable and ductile."}; fc[27] = {t:"Molecular Compound",d:"A compound composed of atoms held together in molecules by covalent bonds."}; fc[28] = {t:"Molecular Formula",d:"A notation showing the number and type of atoms present in one molecule of a molecular compound."}; fc[29] = {t:"Natural Abundance",d:"The proportion of a particular isotope, usually expressed as a percentage, relative to all the isotopes of that element in a natural sample."}; fc[30] = {t:"Neutron",d:"An electrically neutral (uncharged) subatomic particle found in the nucleus of an atom."}; fc[31] = {t:"Neutron Capture",d:"The absorption of a neutron by a nucleus."}; fc[32] = {t:"Noble Gases",d:"The elements in group 18 of the periodic table."}; fc[33] = {t:"Nonmetals",d:"Elements with properties opposite those of metals including poor conductors of heat and electricity."}; fc[34] = {t:"Nucleon",d:"Either a proton or a neutron in a nucleus."}; fc[35] = {t:"Nucleosynthesis",d:"The natural formation of nuclei as a result of fusion and other nuclear processes."}; fc[36] = {t:"Nucleus",d:"(of an atom)
The positively charged center of an atom that contains nearly all the atom’s mass."}; fc[37] = {t:"Nuclide",d:"A specific isotope of an element."}; fc[38] = {t:"Organic Compounds",d:"Compounds containing carbon, and commonly including certain other elements such as hydrogen, oxygen, and nitrogen."}; fc[39] = {t:"Oxoanions",d:"Polyatomic ions that contain oxygen in combination with one or more other elements."}; fc[40] = {t:"Periodic Table of Elements",d:"A chart of the elements in order of their atomic numbers and in a pattern based on their physical and chemical properties."}; fc[41] = {t:"Periods",d:"The horizontal rows in the periodic table."}; fc[42] = {t:"Polyatomic Ions",d:"Charged groups of two or more atoms joined together by covalent bonds."}; fc[43] = {t:"Proton",d:"A positively charged subatomic particle present in the nucleus of an atom."}; fc[44] = {t:"Quarks",d:"Elementary particles that combine to form neutrons and protons."}; fc[45] = {t:"Radioactivity",d:"The spontaneous emission of high-energy radiation and particles by materials."}; fc[46] = {t:"Transition Metals",d:"The elements in groups 3 through 12 of the periodic table."};