Term | Definition |
Matter | anything that occupies space and has mass. |
Mass | the quantity of matter an object has. |
Element | substances that cannot be broken down chemically into simpler kinds of matter. |
Atom | The simplest particle of an element that retains all of the properties of that element. |
Nucleus | The central region of an atom. |
Proton | a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the atomic number |
Neutron | a subatomic particle that ahs no charge and that is located in the nucleus of an atom |
Atomic Number | The number of protons in a atom. |
Mass Number | is equal to the total number of protons and neutrons in an atom. |
Electron | a subatomic particle that has a negative charge |
Orbital | a region in an atom where there is a high probability of finding electrons. |
Isotope | an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons. |
Compound | a substance made up of atoms of two or more different elements joined by chemical bonds |
Chemical Bond | the attractive force that holds atoms or ions together |
Covalent Bond | a bond formed when atoms share one or more pairs of electrons |
Molecule | a group of atoms that are held together by chemical forces; the smallest unit of matter |
Ion | an atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge. |
Ionic Bond | the attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another. |