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1.1-1.2 vocab

Matter Is anything that has mass and takes up space.
Atom Is a small particle that is the building block of matter.
Substance Is matter with a composition that is always the same.
Element Is a substance made of only one kind of atom.
Molecule Is two or more atoms that are held together by chemical bonds and acts as a unit.
Compound Is a substance made of two or more elements that are chemically joined in a specific combination.
Mixture Is matter that can vary in composition.
Heterogeneous mixture Is a mixture in which the substances are not evenly mixed.
Homogeneous mixture A mixture in which two or more substances are evenly mixed, but not bonded together.
Nucleus Is the region at the center of an atom that contains most of the mass of the atom.
Proton Is a positively charged particle in the nucleus of an atom.
Neutron Is an uncharged particle in the nucleus of an atom.
Electron Is a negatively the charged particle that occupies the space in an atom outside the nucleus.
Electron Cloud Is the region surrounding an atoms nucleus where one or more electrons are most likely to be found.
Atomic number Is the number of protons in the nucleus of an atom of an element.
Isotope Is one of two or more atoms of an element having the same number of protons, but a different number of neutrons.
Ion Is an atom that has a charge because it has gained or lost electrons.
Created by: stalecal1365