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MCRT - Chemistry
MCRT Chemistry
| Question | Answer |
|---|---|
| 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
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