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MCRT - Chemistry

MCRT Chemistry

QuestionAnswer
proton positively charged and possesses a mass of one atomic mass unit (amu), is located within the nucleus of the atom
neutron occupies a position within the atom’s nucleus. They possess no charge (neutral) and have a mass of 1 amu
atomic mass The sum of the number of protons and the number of neutrons inside the nucleus of an atom constitutes the atom’s atomic mass
isotope has the same atomic number but differs in atomic mass
electron negative charge and contribute essentially nothing to the atomic mass of the atom. They are positioned at various levels around an away from the nucleus.
Electrovalent or ionic bond Results when the atoms of two or more elements combine with each other by transferring electrons
rule of 8 The tendency in nature is for all atoms to seek 8 electrons in the outermost electron shell
Ion charged bodies that have lost or gained electrons
Cation substance that has lost an electron
Anion substance that has gained electron
Covalent bonds Result from the sharing of one or more pairs of electrons
Kinetic Theory of Matter states that any given sample of matter is composed of many small particles (molecules, atoms, or ions) that are in constant motion.
van der Waals forces the forces between adjacent molecules, limit the mobility of molecules in a solid
liquids molecules are free to move about within the confines of the container
Define Pressure quantitatively defined as a force (F) acting perpendicularly to a surface area (A) or P = F / A
Acid a substance that releases hydrogen ions (H+), or donates protons. A substance that increases the hydrogen ion concentration of a solution.
Base a compound that provides hydroxyl ions (OH-)
acidic Solutions that have greater amounts of H+ ions, as compared to the number of OH- ions
alkaline Solutions having a greater concentration of OH- ions relative to their H+ concentration
The mathematical expression indicating pH -log [H+]
Created by: smiddleton