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unit 2 atom

atom and periodic tabel

TermDefinition
Atomic radius The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus
Chemical family Chemical Family means a group of elements in the Periodic Table or, more commonly, compounds that share certain physical and chemical characteristics and have a common name.
EM spectrum The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies.
Electronegativity Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.
Frequency Frequency is the number of occurrences of a repeating event per unit of time.
Ionic radius the radius of a monatomic ion in an ionic crystal structure
Ionization energy ionisation energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.
Isotopes Isotopes are two or more types of atoms that have the same atomic number and position in the periodic table
Plancks constant The dimension of Planck's constant is the product of energy multiplied by time, a quantity called action.
Valance electrons a valence electron is an electron in the outer shell associated with an atom
Wavelength the distance over which the wave's shape repeats.
Alkali metals The alkali metals consist of the chemical elements lithium, sodium, potassium, rubidium, caesium, and francium
Alkaline earth metals The alkaline earth metals are six chemical elements in group 2 of the periodic table.
Atom An atom is the smallest unit of ordinary matter that forms a chemical element.
Atomic number The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element.
Avg atomic mass The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element.
Electrons The electron is a subatomic particle, whose electric charge is negative one elementary charge
Electron Affinity The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion
Halogens The halogens are a group in the periodic table consisting of five or six chemically related elements
Mass number The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus.
Neutrons a subatomic particle of about the same mass as a proton but without an electric charge(neutral charge)
Noble gases any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table
Nucleus The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
Oxidation number The oxidation state, sometimes referred to as oxidation number, describes the degree of oxidation of an atom in a chemical compound
Photon The photon is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Proton Protons are positively charged particles found within atomic nucleus
Speed of light Speed of light definition, a fundamental universal constant, the speed at which light and all forms of electromagnetic radiation
Transition metals any of the set of metallic elements occupying a central block
Created by: jg373064
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