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chem vocab
Term | Definition |
---|---|
Nucleotide | the building block of DNA and RNA |
Neutrons | neutral charges |
Proton | positive charges |
Electrons | negative charges |
Sublimation | changing from a gas to a solid without becoming a liquid |
Boiling point | the temperature at which a liquid boils and turns into vapor |
Nucleic acid | long molecules made of nucleotides |
Metal | a substance that is a good conductor of electricity and heat , forms cations by loss of electrons and yields basic oxides and hydroxides |
phosphate group | a phosphorus atom bound to four oxygen atoms |
Condensation | changing of vapor to gas or liquid |
Density | the amount of mass per volume |
Boiling | liquid at temperature at which it is changing to a vapor |
melting | changing from a solid to a liquid due to temperature |
Meter | Basic unit of length in the metric system |
Hydrogen Bonds | the attraction between hydrogen atoms and highly electronegative atoms |
Volume | the amount of space something take up |
Freezing | changing from a liquid to a solid due to temperature |
Acid | a substance with ph less than 7 |
Exergonic | release energy |
Anion | a negatively charged ion |
Carbohydrate | sugars and starches, which the body breaks down into glucose |
Endothermic | involving absorption of heat |
nonmetal | any element or substance that is not metal |
Gas | a state of matter composed of molecules in constant random motions |
solids | a state of matter that retains its shape and density when not contained |
Cation | a positively charged ion |
Gram | metric unit of mass |
Liter | measurement of volume |
Group | A column of elements in the periodic table |
Exothermic | involving release of heat |
Endergonic | require energy |
Catalyst | a substance that increases the rate of a chemical reaction without undergoing permanent chemical changes |
Melting point | the temperature at which a solid changes to a liquid |
Covalent bond | a chemical bond in which electron pairs are shared between atoms |
Ions | a positively or negatively charged atom or molecule |
Reactions can be _______ and_______. | exergonic and endergonic |
Base | substance with ph greater than 7 |