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8th Ch3AtomsVocab

a data set by timmiguez
created October 4, 2016
COPY & EDIT
FAMILY TREE
TermDefinition
AtomBasic unit of matter
ProtonA subatomic particle that has a positive charge and that is found in the nucleus of an atom
NeutronA subatomic particle that has no charge and that is found in the nucleus of an atom
electronA subatomic particle that has a negative charge. Circles the nucleus in the electron cloud
ElementA pure substance made of only one kind of atom
MetalElements that are good conductors of heat and electric current. Gold, Copper
NonmetalsElements that are poor conductors of heat and electric current. Oxygen, Neon
metalloidsElements that have properties of both metals and nonmetals. silicon, germanium
Valence electronOuter most electrons; these are the electrons involved in forming chemical bonds
Electron dot diagramA model of an atom in which each dot represents a valence electron-Lewis Diagram
reactiveA chemical bond that involves SHARING of electrons between atoms in a molecule
nonreactiveNot capable of easily undergoing a chemical change.
Chemical bondthe force that holds atoms together
Atomic numberNumber of protons. Determines the element
IonA charged atom. Has lost or gained electrons
Polyatomic ionAn ion composed of more than one ion
Ionic bondFormed when one or more electrons are transferred from one atom to another
Ionic compoundA compound that consists of positive and negative ions bonded to form a neutral ionic compound
Chemical formulaA combination of chemical symbols and numbers to represent a substance. "recipe"
SubscriptA number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
CrystalAn orderly, three-dimensional pattern of ions or atoms in a solid
Covalent bondA chemical bond that involves SHARING of electrons between atoms in a molecule
MoleculeA group of atoms bonded together by the sharing of electrons
Molecular compounda chemical compound whose simplest units are molecules
half-lifethe time it takes for a radioactive element to decay by half
isotopean atom of the same element with a different number of neutrons. Hydrogen-2 is an example. The 2 is the mass. Carbon-14, U-238
atomic masssum of protons and neutrons
Double bondA chemical bond formed when atoms share two pairs of electrons
Triple bondA chemical bond formed when atoms share three pairs of electrons
Nonpolar bonda covalent bond in which electrons are shared equally
Polar bonda covalent bond in which electrons are shared unequally. One part of the molecule is positive, the other negative
Van der Waals forcesa slight attraction that develops between the oppositely charged regions of nearby molecules. Responsible for water surface tension
Sub-below or less than
Super-above or greater than
Poly-many
Co-sharing; together
Non-without; not
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