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Honors Biology Chapter 2 Test
Terms in this set (58)
Anything that occupies space and has mass.
The quantity of matter an object has.
Substances that cannot be broken down chemically into simpler kinds of matter.
The simplest particle of an element that retains all of the properties of that element.
The central region that makes up the bulk of the mass of the atom and consists of 2 subatomic particles, the proton and neutron.
A positive charged subatomic particle.
The number of protons in an atom.
The number of protons in an atom.
A negatively charged particle.
A three-dimensional region around a nucleus that indicates the probable location of an electron.
Atoms of the same element that have a different number of neutrons.
What is made up of atoms or elements in fixed proportions.
The attractive force that holds atoms together.
Forms when two atoms share one or more pairs of electrons.
The simplest part of a substance that retains all of the properties of that substance and can exist in a free state.
The attraction between positive and negative electrical charges.
An atom or molecule with an electrical charge.
Subatomic particle in an atom that has no charge.
The ability to do work.
When one or more substances change to produce one or more different substances.
Substances that enter chemical reactions.
Substances produced by chemical reactions.
The term used to describe all of the chemical reactions that occur in an organism.
The amount of energy needed to start the reaction.
Certain chemical substances that reduces the amount of activation energy that is needed for the reaction to take place.
A protein or RNA molecule that speeds up metabolic reactions without being permanently changed or destroyed.
Reactant in which electrons are transferred.
Redox reactions (oxidation-reduction reaction)
When a reactant loses one or more electrons, this becoming more positive in charge.
When a reactant gains one or more electrons, thus becoming more negative in charge.
A molecule with an uneven distribution of charge.
The force of attraction between a hydrogen molecule with a partial positive charge and another atom or molecule with a partial negative charge.
An attractive force that holds molecules of a single substance together.
The attractive force between molecules that results in the rise of the surface of a liquid when in contact with a solid.
A mixture in one or more substances that are uniformly distributed in another substance.
The substance dissolved in the solution.
A substance in which the solute is dissolved.
The amount of solute dissolved in a fixed amount of the solution.
A solution in which no more solute can be dissolved.
Solutions in which water is the solvent.
The number of hydronium ions in a solution is greater than the number of hydroxide ions.
Any solution that contains more hydroxide ions than hydronium ions.
A scale used for comparing the relative concentrations of hydronium ions and hydroxide ions in a solution. The scale ranges from 0-14. 0 is very acid, 7 is neutral, and 14 is very basic.
Chemical substances that neutralize small amounts of either an acid or a base added to a solution.
The number of ______ never varies during a chemical reaction.
The mass number is equal the number of protons and ________.
The average atomic mass is the number of isotopes added up and _______.
What is the strongest bond?
In chemical reactions, _______ are broken between substances.
When 2 bonds on the left side of the equation are broken, you ______ energy.
Oxidation ______ 1 or more electrons.
Reduction _______ 1 or more electrons.
The ______ of water makes it effective at dissolving other polar substances such as sugars, ionic compounds, and some proteins.
Water is not good a dissolving ___ ______ molecules.
Cohesion pulls _____.
Hydrogen bonds do not break until _____ is added.
________ is the universal solvent.
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