| A | B |
|---|
| acid | forms hydrogen ion (H+) in water, pH is less than 7 |
| atom | the basic unit of matter |
| base | forms hydroxide ion (OH-) in water, pH is greater than 7 |
| chemical reactions | process that leads to the transformation of one set of chemical substances into another |
| compound | a pure chemical substance consisting of two or more different chemical elements in a fixed ratio that can be separated into simpler substances by chemical reactions |
| covalent bond | a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms. |
| electron | subatomic particle with a negative charge; has a very tiny mass |
| electronegativity | a chemical property that describes the tendency of an atom or a group of atoms to attract electrons towards itself. |
| element | pure chemical substance consisting of one type of atom |
| ion | an atom or molecule in which the total number of electrons is not equal to the total number of protons, giving it a net positive or negative electrical charge |
| ionic bond | a form of chemical bonding that is characterized by the transfer of electrons from on atom or group of atoms |
| isotope | variants of a particular chemical element that share the same number of protons, but have different number of neutrons |
| mixture | a material made up by two or more different substances which are mixed but are not combined chemically |
| molecule | is an electrically neutral group of two or more atoms held together by covalent chemical bonds. |
| neutron | subatomic particle found in the nucleus of an atom, has no electrical charge and a mass about equal to a proton |
| nucleus | center portion of an atom, has a net positive charge |
| pH | a scale to determine how acidic or basic a solution is |
| proton | subatomic particle found in the nucleus of an atom, has a positive charge and a mass about equal to a neutron |
| solution | a homogenous mixture composed of material all of the same phase (solid, liquid or gas) |
| solute | the substance that is dissolved into another substance |
| solvent | the substance that dissolves another substance |
| subatomic particles | three particles that are smaller than an atom and combine together to form atoms |
