Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
SJCC Bio Ch 2
Vocabulary terms for Holt Modern Biology Chapter 2
| Question | Answer |
|---|---|
| atom | smallest particle of matter |
| atomic number | number of protons in an atom |
| bond | attraction between atoms |
| chemical reaction | process of making or breaking bonds |
| compound | atoms of two or more elements combined |
| covalent bond | atoms share pairs of electrons |
| electron | negatively charged particle found orbiting the nucleus of an atom |
| element | simplest type of matter |
| energy level | areas where electrons are found in an atom |
| ion | an atom that has lost or gained electrons making it positively or negatively charged |
| ionic bond | an attraction between atoms that have transferred electrons |
| mass | quantity of matter an object has |
| matter | anything that has mass and takes up space |
| molecule | chemical structure made up of one or more atoms |
| neutron | subatomic particle in the nucleus of an atom with no charge |
| nucleus | center of an atom containing protons and neutrons |
| proton | positively charged subatomic particle |
| activation energy | amount of energy needed to start a chemical reaction |
| catalyst | speeds up a chemical reaction by lowering the activation energy |
| endergonic reaction | a reaction that absorbs energy |
| energy | the ability to do work or cause change |
| enzyme | biological catalyst; a protein |
| exergonic reaction | reaction that releases energy |
| free energy | energy in a system that is available for work |
| oxidation reaction | a reactant loses one or more electrons becoming more positive in charge |
| product | compound formed by a chemical reaction |
| reactant | compound involved in a chemical reaction |
| redox reaction | reactions in which electrons are transferred between atoms |
| reduction | a reactant gains one or more electrons becoming more negative in charge |
| state | solid, liquid, or gas |
| acid | a solution in which the concentration of hydronium ions is greater than the concentration of hydroxide ions |
| alkaline | refers to bases |
| aqueous solution | a solution in which water is the solvent |
| base | a solution that has more hydroxide ions than hydronium ions |
| buffer | chemical substances that neutralize small amounts of an acid or base |
| concentration | amount of solute dissolved in a fixed amount of solution |
| dissociation | breaking apart of water molecule into two ions of opposite charge |
| hydronium ion | H3O+ |
| hydroxide | OH- |
| pH scale | ranges from 0-14 and measures the relative amount of hydronxium ions in a solution |
| saturated solution | one in which no more solute can dissolve |
| solute | substance dissolved in a solution |
| solution | a mixture in which one or more substances are uniformly distributed |
| solvent | substance in which the solute is dissolved |
Created by:
jmglbrt
Popular Biology sets