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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 atoms nucleus. Is the identity of the element and 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 |
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 bond together |
chemical bond | An iteration 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 ions bond |
Covalent bond | The type of bond that forms when atoms save electrons instead of transferring them |
Metallic bond | A special bond between metal ions and the electrons that swim around them |
Malleability | metal can be pounded into sheets |
Ductility | Metals can be stretched and down into wires |
Conductivity | electrical: metal can conduct or carry electricity through wires. Thermal: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 bonding. |
Compound | A set of elements that are chemically banded a changed into new substances NaCI=SALT |
chemical Formula | A shorthand way to use chemical symbols and numbers to a represent a substance. |
chemical equation | Uses symbols to show the relationship between the reactants and the products |
subscript | small number to the right of the element that shows how many atoms there are of the element. |
Coefficient | The large number that multiplies atoms of the element |
Diatomic molecule | A molecule made of 2 atoms of the same element ex. 2 oxygen atoms |
Reactant | A substance or molecule that starts a chemical reaction. |
product | The substance that forms as a result of a chemical reaction |
Law of conservation of mass | States that matter is neither created nor destroyed in a chemical reaction. |
double displacement reaction | The 2 metals ions in 2 compounds switch places in a chemical reaction |
indicator | will changes colors in the presence of an acid or a base. |
single displacement reeaction | one element replaces another element in compound leaving a new compound and 1 element |
synthesis Reaction | when two or more substances combine to create one new compond |