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Chemistry
Term | Definition |
---|---|
Atom | Smallest piece of matter that has the same properties of the element it is in. |
Proton | A positive subatomic particle in the atom's 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 organizes all the elements by atomic number and properties. |
Valence Electron | The electron in the outer level of an atom that causes atoms to band together. |
Chemical Bond | A 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 atom. |
Ion | Charged particle or atom that gained or lost electrons. |
Crystal Lattice | Repeating 3 dimensional pattern that forms when Ions bond. |
Covalent Bond | The type of bond that forms when atoms share electrons instead of transferring them. |
Metallic Bond | A special bond between metal ions and the electrons that swim around them. |
Ductility | Metals can be stretched and drawn into wires. |
Malleability | Metals can be pounded into thin sheets. |
Electrical Conductivity | Metal can conduct or carry electricity through wires. |
Thermal Conductivity | Metal can conduct or carry heat in order to cook food. |
Electron Dot Diagram | An easy way to show the valence electrons in an atom or chemical bond. |
Compound | A set of elements that are chemically bonded & changed into new substances. NaCI=salt. |
Chemical Formula | A shorthand way to use chemical symbols and numbers to represent a substance. (H2O) |
Chemical Equation | Uses symbols to show the relationship between the reactants and the products.C+O2->CO2 |
Subscrict | (H2O)-Small number to the right of the element that shows how many atoms there are of the element. |
COEFFICIENT | The large number that atoms of the element 2 (I+3NA) |
Molecule | 2 or more atoms joined in a definite ratio. Keeps phy. & chem. properties. |
Diatomic Molecule | A molecule made of 2 atoms of the same element-(ex.2 oxygen atoms). |
Synthesis Reaction | When two or more substances combine to create one new compound. |
Decomposition Reaction | A reaction where a single compound breaks down to form 2 simpler substances. |
Single Displacement Reaction | One element in compound leaving a new compound and 1 element. |
Double Displacement Reaction | The 2 metal ions in 2 compounds switch places in a chemical reaction. |
Iondicator | Will changes colors in the presence of a acid or a base. |