vocabulary

1.   Dilute solution is a solution containing a relatively small quantity of solute as compared with the amount of solvent. This term is the opposite of 'concentrated'
2. Ground state is The lowest allowed energy state of an atom, molecul, or ion
3.  An isothermal process is a thermodynamic process in which the temperature of the system remains constant. The heat transfer into or out of the system typically must happen at such a slow rate that the thermal equilibrium is maintained.
4.  Valency is how easily an atom or radical can combine with other chemical species. This is determined based on the number of electrons that would be added, lost or share if it reacts with other atoms.
5. Corrosion is the irreversible damage or destruction of living tissue or material due to a chemical or electrochemical reaction
6.  pH scale is measures the activity of hydrogen ions in a substance. If a substance has a pH less than 7 is said to be acidic. If the pH is greater than 7 then it is said to be alkaline or alkali.
7.  Proton  is A particle in a nucleus that holds a positive charge.
8.  Reactions is Processes that occur when two or more chemicals are combined to form other chemicals.
9. Allotropes is two molecular forms, or crytaline form more of a particular element
10.  Alkyne is A hydrocarbon chain containing a triple double bound
11. Quarks is Smaller particles in neutrons and protons.
12. Single Displacement Reaction is One element replaces another to make a product
13. Polyatomic Ion  is Positively or negatively charged, covalently bonded group.
14. Periods   is  Horizontal rows of elements
15. Pascal  is  Used to measure pressure
16. Physical Change   is A change in size, shape, or state
17. Oxidation Number  is Tells you how many electrons an atom has gained or lost.
18. Molecule  is  A neutral molecule that forms as a result of electron sharing.
19. Metallic Bonding  is Positively charged metallic ions surrounded by a electron cloud
20. Melting Point  is  The point in temperature when the solid starts to liquefy
21. Law of Conservation and Mass is The mass of all substances that are present before a chemical change equals the mass of all the substances after the change
22. Kinetic Theory  is  Explanation of how particles in matter behave
23. Ionic Bond    is Force of attraction between opposite charges
24. Heat of Vaporization  is Amount of energy required for a liquid to become a gas.
25. Homogeneous Mixture  is Contains 2 or more gases, liquids, or solids substances blended evenly
26. Heterogeneous Mixture  is Mixture in which different materials can easily be distinguished
27. Electron Dot Diagram  is Uses the symbol of the element and dots to represent electrons
28. Electrons  is Particles in a atom with a negative charge.
29.  Effusion is Effusion is when a gas moves through an opening into a low-pressure container (e.g., is drawn by a vacuum). Effusion occurs more quickly than diffusion because additional molecules aren't in the way
30. Denature is There are two common meanings for this in chemistry. First, it can refer to any process used to make ethanol unfit for consumption (denatured alcohol). Second, denaturing can mean breaking down the three-dimensional structure of a molecule, such as a protein is denatured when exposed to heat.
31. Double Displacement Reaction  is Two elements replace another to make a product.
32. Diatomic Molecule is Consists of 2 atoms of the same element in a covalent compound
33. Decomposition Reaction is One substance breaks down, into 2 more.
34. Chemical Formula is A formula that shows what elements are in a compound and what it will become.
35. Colloid  is Type of mixture with particles that are larger than those in solutions, but not heavy enough to settle out
36.  Chemical Property is Characteristic of a substance that indicates whether it can undergo a chemical change
37. Crystal is A crystal is an ordered, repeating three-dimensional pattern of ions, atoms, or molecules. Most crystals are ionic solid, although other forms of crystals exist
38. Critical point  is The critical point is the endpoint of the liquid-vapor line in phase dagram, past which a supercritical liquid forms. at the critical point, the liquid and vapor phases become indistinguishable from one another.
39. Critical mass  is Critical mass is the minimum quantity of radioactive material needed to cause a nuclear chain reaction
40. Periods   is  Horizontal rows of elements.