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Ms Cambell Scinece

Electron Dot Diagram An easy way to show the valence electron in an atom or chemical bond
Compound A set of elements that are chemically bonded and changed into new substances NaCl= salt
Ductility metals that can be stretched and drawn into into wires
Malleability metals can be pounded into thin sheets
Metallic bond A special bond between metal ions and the electrons that swim around them
Conductivity metal can conduct electricity and heat
Covalent bond The type of bond that forms when atoms share electrons instead of tranferring them
Crystal lattice Repeating 3 dimensial pattern that forms when ions bonds
Atom smallest peice of matter that has the same properties of the element it is in
Proton A positive, +, subatomic particle in the atoms nucleus. Is the identity of the element and a atomic number
Neutron A neutral subatomic particle in the atoms nucleus. Has no charge and most of the mass
Electron A negative subatomic particle spinning outside the nucleus of an atom. Tiny!
Element The simplest forms of matter that contain only one type of atom
Periodic Table of Elements A chart that organized all the elemensts by atomic number and properties
Valence Electrons The electron in the outer most level of an atom that causes atoms to bond together
Chemical Bond An interaction that holds 2 atoms together
Chemical Bonding The joining of atoms to form new substances
Ionic Bond IS formed when electrons are transferred from one atom to another
Ion Charged particle of atom that gained or lost electrons
Chemical Formula A shorthand way to use chemical symbols and numbers to represent a substance (H20)
Chemical Equation Uses symbols to show the relationship between the reactants and the products C+02->CO2
Subscript small number to the right of the element that shows how many atoms there are of this element
Coefficient The large number that multiplies atoms of the element 2Cl+3Na
Molecule 2 or more atoms joined in a definite ratio keeps physical and chemical properties
Diatomic Molecule A molecule made of 2 atoms of the same element (ex oxygen atoms.
Reactant A substance or molecule that starts chemical reactions
Product The substance that forms as a result of a chemical reaction
Law of Conversation of Mass State that matter is neither created nor destroyed in a chemical reaction
Synthesis Reaction When two or more substances combine to create one new compound
Decomposition Reaction A reaction here a single compound breaks down to form 2 simpler substances
Single- Displacement Reaction One element replaces another element in compound and 1 element
Double-Displacement Reaction The 2 metal ions in compound switch places in a chemical reacton
Indicator Will change colors in the presence of an acid or a base



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