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Elyssa-Science Atoms

Review for Atomic Quest

Vocabulary WordDefinition
ductile material that can be pulled out, or drawn, into a long wire
reactivity ease of an element to combine or react with other elements and compounds
malleable material that can be hammered or rolled into flat sheets and other shapes
amu atomic mass units - protons or neutrons have a mass equal to one amu
chemical symbol a one or two letter abbreviation of an element's name
alloy a reaction of a metal with another element, usually another metal
covalent bond atoms held together by sharing electrons
ionic bond charged particles held together by an electrical attraction
valence electrons electrons found in the outermost or valence shell of an atom
cloud the part of an atom that contains electrons
atomic number the number of protons in the nucleus of an atom
proton particle of nucleus that has a positive charge
isotope atoms with the same number or protons but a different number of neutrons
average atomic mass the average mass of all the isotopes of an element
neutron particle of nucleus that has no charge or is neutral
period horizontal row of a periodic table
group vertical column of a periodic table also known as a family
electron particle of atom that has a negative charge and moves rapidly around the nucleus
conductive ability to transfer heat or electricity to another object
corrosion the destruction of a metal through reaction with air or water
metal element whose properties include: shininess, malleability, ductility and conductivity
alkali metal Group 1 metals that react by losing one electrons
alkaline earth metal Group 2 metals that react by losing two electrons
transition metal Groups 3 - 12 metals
halogens Group 17 nonmetals that are very reactive
nobel gases group 18 unreactive gases
chemical reaction losing, sharing, or gaining electrons in its valence shell
ion a charged particle that forms when an atom gains or loses electrons
metallic bond charged metal ions are attracted to the electron cloud of a metal
mass of atoms mostly located in the nucleus
volume of atoms mostly the cloud of electrons
models used when something is too big or small, too dangerous, or too fast or slow to observe
atomic particles smaller particles called protons, neutrons and electrons
periodic table contains the chemical name, chemical symbol, atomic number, and average atomic mass
Mendeleev arranged the known elements of his day, in a table by atomic mass, failing to consider isotopes
molecule the bonding of two or more atoms
mass number sum of protons and neutrons in the nucleus of an atom
diatomic molecule two atoms of the same element bonded together
synthetic element a man-made element not found in nature
metalloid an element that have properties of both metals and nonmetals, also called a semi-conductor
stable atoms atoms are stable (happy, happy, happy) when they have eight valance electrons or none after reacting (except hydrogen and helium which need only two in the valance cloud or shell)
Created by: Momof4