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Biology Terms # 2
High School Biology
| Question | Answer |
|---|---|
| acid | a solution that has a higher concentration of hydrogen ions than hydroxide ions |
| atom | the smallest, indivisible building block of matter. Each atom is made up of a nucleus and and election shell |
| atomic mass | the "weight" of an element determined by the addition of protons and neutrons: the result is expressed in "atomic mass units" |
| atomic number | a number assigned to every element that corresponds to the number of protons in the nucleus of the most common form of the element |
| atomic symbol | a one or two letter abbreviation to identify the element |
| base | a solution that has a higher concentration of hydroxide ions than hydrogen ions |
| Bohr Model | a commonly used model to describe how atoms look and interact with one another |
| chemical bond | electrons combining together from different atoms resulting in the formation of a molecule |
| covalent bond | equal sharing of electrons between atoms involved in a chemical bond |
| dissociate | the "falling apart" or (dissolving) of ions in a solution |
| electron | negatively charged subatomic particles that orbit the nucleus of an atom |
| electron shell (energy level) | the area outside of the nucleus where electrons are found orbiting the nucleus |
| element | a group of the same atoms bonded together, matter composed only of the same type of atom |
| hydrogen bond | bonds formed between hydrogen and a polar molecule solution containing polar chemical bonds |
| ion | an atom that has a positive or negative charge |
| ionic bond | a chemical bond that forms due to the attraction of a positive ion to a negative ion |
| isotope | different forms of the same element that differ only in the number of protons |
| Law of Conservation of Mass | the law that no mass can be lost or destroyed in a chemical reaction; the number of molecules on the reactant side must balance (be equal to) the number of molecules on the product side |
| mass | the quantity of matter an object has |
| matter | anything that takes up space and has mass; can exist as a solid, liquid, or gas. |
| molecule | a group of two or more atoms bonded together |
| neutron | a neutrally charged(no charge)subatomic particle located in the nucleus of an atom |
| non-polar bond | a covalent bond (electron sharing bond) resulting in electrons being equally shared by the atoms of the bond |
| nucleus | the center part of the atom that contains protons and neutrons |
| octet rule | the property of the chemical bonding that results in eight electrons filling the outer shell |
| pH | the measure of acidity or basicity of a solution |
| polar bond | a covalent bond (electron sharing bond) resulting in electrons being slightly more attracted to one atom of the bond than another |
| product | the resulting molecule(s) from a chemical reaction |
| proton | a positively charged subatomic particle that is located in the nucleus of an atom and has a mass of 1 atomic unit |
| reactants | elements or atoms that take place in a chemical reaction or bond |
| solute | the molecules of a solution that are in lower quantities |
| solution | a homogenous combination of atoms in a liquid, solid or gas |
| solvent | the molecules of a solution that are in greater quantities |
| subatomic particles | particles smaller than atoms; although there are more than three, the most common ones are protons, neutrons and electrons |
Created by:
Willifords2005
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