Atoms, Molecules, and the Elements: Atoms, Molecules, and the Elements A Science Unit for Mrs. Berg’s Class
atom : atom 1. The basic building block of matter. 2. The smallest component of an element having the chemical properties of the element.
chemical formula : chemical formula noun A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound. ex. Al2(SO4)3
compound : compound noun,verb,adjective A substance made up of two or more elements chemically joined together into a molecule. NaCl = salt
electron : electron noun particle in an atom that has a negative electrical charge
element: element noun A substance whose atoms are all alike. There are over 100 elements on the Periodic Table.
gas: gas noun,verb One of the three states of matter. This state of matter has no fixed shape and no fixed volume.
heterogeneous: heterogeneous adjective These types of mixtures contain more than one substance evenly mixed but not chemically bonded together and is the same throughout.
homogeneous : homogeneous adjective When two or more substacnes come together but don't chemically combine or bond to make a new substance it is called this.
inorganic : inorganic adjective Any substance that does not contain carbon.
ion : ion noun a positively or negatively charged atom
liquid : liquid noun,adjective A state of matter that has no fixed shape but that has a definite volume.
matter : matter noun,verb Anything that takes up space and has mass.
molecule : molecule noun The smallest physical unit of a substance that can exist independently, consisting of one or more atoms held together by chemical forces.
neutron : neutron noun An elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus.
nucleus: nucleus 1. The positively charged center of an atom. 2. The nucleus is in the center of the atom
organic: organic noun,adjective Obtained from a living thing; Containing carbon
particles : particles noun Very small pieces of matter.
proton : proton noun A stable particle with positive charge equal to the negative charge of an electron.
solid : solid noun,adjective A state of matter that has a definite shape and a definite volume.
solution : solution noun A homogeneous mixture that has dissolved substances.