vocablary about chemistry

Vocablary

No	Vocab	Explanation
1	enthalpy	measure of the total energy of a thermodynamic system(usually symbolized as H)
2	indicator	a special compound added to solution that changes color depending on the acidity of the solution; different indicators have different colors and effective pH ranges
3	colloid	mixture of evenly dispersed substances, such as many milks.
4	base	a substance that accepts a proton and has a high pH ; a common example is sodium hydroxide (NaOH).
5	catalyst	a chemical compound used to change the rate (either to speed up or slow down) of a reaction, but is regenerated at the end of the reaction.
6	conductor	material that allows electric flow more freely
7	covalent bond	chemical bond that involves sharing electrons
8	crystal	a solid that is packed with ions, molecules or atoms in an orderly fashion
9	combustion	an exothermic reaction between an oxidant and fuel with heat and often light
10	compound	a substance that is made up of two or more chemically bonded elements
11	condensation	the phase change from gas to liquid
12	accuracy	how close a value is to the actual or true value; also see precision
13	acid	a compound that, when dissolved in water, gives a pH of less than 7.0 or a compound that donates a hydrogen ion.
14	acid anhydride	a compound with two acyl groups bound to a single oxygen atom
15	addition reaction	within organic chemistry, when two or more molecules combine to make a larger one
16	aeration.	the mixing of air into a liquid or solid
17	alkali metals.	the metals of Group 1 on the periodic table
18	alkaline earth metals	the metals of Group 2 on the periodic table
19	allomer	a substance that has different composition than another,but has the same  crystalline structure
20	allotropy	elements that can have different structures (and therefore different forms), such as Carbon (diamonds , graphite , and fullerene )
21	anion	negatively charge ions anode
22	aromaticity	chemical property of conjugated rings that results in unusual stability. See also benzene .
23	bond	the attraction and repulsion between atoms and molecules that is a cornerstone of chemistry
24	burette (also buret)	glassware used to dispense specific amounts of liquid when precision is necessary (e. g. titration and resource dependent reactions)
25	lattice	Unique arrangement of atoms or molecules in a crystalline liquid or solid.
26	Laws of thermodynamics	A state of matter which takes the shape of its contain
27	liquid light	Portion of the electromagnetic spectrum which is visible to the naked eye
28	acid dissociation constant	an equilibrium constant for the dissociation of a weak acid
29	actinides	the fifteen chemical  elements that are between actinium (89) and lawrencium (103 )
30	activated complex	a structure that forms because of a collision between molecules while new bonds are formed activation energy activity series actual yield.
31	atom	a chemical element in its smallest form, and is made up of neutrons and protons within the nucleus and electrons circling the nucleus atomic mass unit
32	ionic bond	electrostatic attraction between oppositely charged ions
33	atomic number	the number representing an element which corresponds with the number of protons within the nucleus
34	melting	The phase change from a solid to a liquid
35	metalloid	A substance possessing both the properties of metals and non-metals
36	methylene blue	a heterocyclic aromatic chemical compound with the molecular formula  C 16H 18N 3 SCl
37	ionization	The breaking up of a compound into separate ions.
38	enthalpy	measure of the total energy of a thermodynamic system(usually symbolized as H)
39	freezing	phase transition from liquid to solid
40	Faraday constant	a unit of electrical charge widely used in electrochemistry and equal to~ 96,500 coulombs.