1. C HEMISTRY WEEK 2: WORDS 1. Matter 2. Physical Properties 3. Chemical Properties 4. Pure Substance 5. Mixture 6. Homogeneous 7. Heterogeneous 8. Element 9. Molecule 10. Solute 11. Solvent 12. Compound

2. WORD OF THE DAY : MATTER : Anything that has a mass and takes up space. PHYSICAL PROPERTIES : a property that can be observed without changing the identity of the substance. CHEMICAL PROPERTIES : characteristics of a material that cannot be observed without causing a chemical change.

3. WORD OF THE DAY: PURE SUBSTANCE: A sample of matter that has definite chemical and physical properties and cannot be changed into a simpler substance. MIXTURE : Combination of two or more pure substances that are NOT chemically combined HOMOGENEOUS: Molecules are mixed up in an even distribution HETEROGENEOUS: Molecules are NOT mixed up in an even distribution

4. ELEMENT : Pure substances that cannot be separated into simpler substances MOLECULE : Composed of two or more elements that are joined by a chemical bond. COMPOUND : Pure substance composed of two or more different elements joined by chemical bonds SOLUTE : Substance being dissolved SOLVENT : Substance the solute is dissolved in WORD OF THE DAY:

5. C HEMISTRY WEEK 2: WORDS 1. Physical Change 2. Chemical Change 3. Sublimation 4. Precipitate 5. Periodic Table 6. Atom 7. Proton 8. Neutron 9. Electron 10. Nucleus 11. Electron Cloud/Shell 12. Particle Charge

6. Physical Change : A change to a substance that does not destroy a substance, but changes what it looks like Chemical Change : Occurs after a reaction when what is formed/left over is not the same as the stuff that was started with. Sublimation : Transition directly from a solid to a gas phase. Precipitate : A solid that is formed when two liquids are mixed WORD OF THE DAY:

7. Periodic Table : a chart used to organize the elements Atom : smallest unit of matter Proton : positively charged particle in an atom’s nucleus Neutron : a neutrally charged particle found in the nucleus of an atom Electron : a negatively charged particle found in shells orbiting the nucleus of an atom WORD OF THE DAY:

8. Electron Cloud/Shell: the area around the nucleus of an atom where the electrons can be found Particle Charge: A particle with an electric charge; Any particle with a deficit or excess electrons. WORD OF THE DAY:

9. 1. Mendeleev 2. Moseley 3. Periods 4. Groups 5. Atomic Mass 6. Atomic Number 7. Mass Number 8. Metalloid 9. Noble Gases 10. Non-Metals 11. Ion 12. Ionic Bond C HEMISTRY WEEK 3: WORDS

10. Mendeleev : Scientist known for constructing the first periodic table, arranged by atomic mass Moseley : later discovered that the periodic table was associated with atomic number, not atomic mass Periods : Horizontal row of elements in the Periodic Table Groups : (Family) elements in the same vertical column of the Periodic Table WORD OF THE DAY:

11. Atomic Mass : Total mass of an atom; The rational (decimal) number in the element box Atomic Number: Number of protons in an atom Mass Number: Number of protons plus Number of Neutrons (Protons + Neutrons) Metalloid : Elements that have properties of both metals and non-metals; found along the stair-step of the periodic table. Noble Gases : Group 18 on the periodic table; these elements are gases that do not usually combine or react with other elements Non-Metals: Elements that have dull surfaces and are poor conductors of electricity, found on the right of the periodic table WORD OF THE DAY:

12. Ion : An atom that has a charge because it added or lost an electron Ionic Bond : A magnetic connection formed between two or more atoms as a result of giving and receiving atoms WORD OF THE DAY:

13. 1. Law of Conservation of Mass 2. Reactants 3. Products 4. Reaction 5. Reactivity 6. Yields 7. Endothermic 8. Exothermic 9. Flammability 10. Malleability 11. Natural Substance 12. Potency C HEMISTRY WEEK 4: WORDS

14. Law of Conservation of Mass : In a chemical reaction, matter cannot be created or destroyed; you have what you started with, it just looks different Reactants : Substances going in to a reaction (The starting “ingredients”) Products : What is made during a reaction (The ending substance) WORD OF THE DAY:

15. Reaction : A change to substance based on the chemical properties of the other substances it is exposed to Reactivity : How likely an element is to bong or change when exposed to another element Yields : Results in, or becomes Endothermic : Taking in energy Exothermic : Giving off or producing energy (releases heat) WORD OF THE DAY:

16. 1. Flammability : The ability of something to burn 2. Malleability : Ability of something to be hammered or flattened without breaking 3. Natural Substance : Any substance that can be found in nature, that man does not have to make 4. Potency : How strong a chemical is WORD OF THE DAY: