salt
A catalyst is generic term used to influence rates of reaction. The catalyst lowers the activation energy required to start the reaction. In biology, catalysts are called enzymes.
For a substance the term is molecule, for an element the term is atom.
an element
A product is a substance that is formed by a chemical reaction.
Semiconductor
Sodium and chlorine do not technically form molecules, but instead an ionically bonded salt. The proper term for what corresponds to a molecule in covalently bonded compounds is "formula unit" for ionically bonded compounds.
The smallest such substance is a molecule, or a formula unit of an ionically bonded compound. Any amount of such a substance also satisfies the requirement given.
Another term is chemical compound.
Both can flow.
The term "true compound" is not specifically defined by the scientific community. Perhaps you are thinking of "pure compound", which is a substance composed of perfectly definite identical particles which are formed from two or more elements. It's possible that a scientist might use the phrase "true compound" to refer to a molecular compound (covalently-bonded) such as H2O or CO2, as opposed to an ionically-bonded compound such as NaCl or H2SO4; but this usage is not officially recognized by the scientific community
All mixtues ARE substances ('Substance' is a generic term for matter). They are not haowever a 'pure' substances.
If something dissolves in water it is said to be 'soluble in water' or 'water soluble'Water is the solvent; the substance that is disolved is called the solute.
That is called apogee, or (to use a more generic term) apapsis.That is called apogee, or (to use a more generic term) apapsis.That is called apogee, or (to use a more generic term) apapsis.That is called apogee, or (to use a more generic term) apapsis.
Strictly speaking, osmosis means the diffusion of waterthrough a semipermeable membrane. I'm not certain what the generic term for other solvents would be.
Rubber is a generic term today. It used to mean a very specific substance. Today you could call various forms of urethane rubber. Is it technically ? NO
noisemaker
Risperidone is the generic term. The brand name is Risperdal.