Chemistry Glossary

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Glossary Week 1

1. Elements: One type of atom

2. Molecules: More than one atom chemically bonded

3. Compounds: More than one type of element chemically bonded

4. Molecular Element: Molecule made up of more than one atom of the same element.

5. Molecular compound: A molecule consisting of more than one type of atom chemically bonded, same as just compound.

6. Monatomic element: An element only comprised of one atom, so it is not a molecule.

7. Pure substance: Only contains one element or compounds and has chemical and physical properties that do not change (can only be separated to two or more substances by chemical means).

8. Mixtures: Contains more than one type of substance, whether is be an element or compound, but are not chemically bonded. They can be separated into individual pure substances by physical means. Different parts of the mixture show different physical properties, or properties of the pure substance making it up.

9. Homogenous: Uniform in composition and is the same throughout-often referred to as a solution. For mixtures, homogenous mixtures exist only in one phase. All pure substances are homogenous. A phase is where all the properties of the matter are uniform and physical properties are distinct.

10. Heterogeneous: Not uniform in composition and is different throughout and is comprised of distinct phases that are observable. They have localized regions that all have different properties and are made of different substances and remain physically separate.

11. Electron: Negatively charged particle surrounding the nucleus of an atom.

12. Proton: Positively charged nucleon in the nucleus of the atom.

13. Neutron: Neutrally charged nucleon in the nucleus of the atom.

KEY WORDS

1. Energy Level

2. Sub-shells (s,p,d, or f).

3. Orbitals (only 2 electrons with opposing spins in each orbital)

4. Electron Configuration

5. Aufbau's Principle

6. Hund's Rule

7.Pauli Exclusion Theory

8. Noble Gas Notation

9. S,P,D,F Blocks

10. Exceptions to Principles

12. Alkali Metals

13. Alkaline Earth metals

14. Transition Metals

15. Halogens

16.Noble Gases

17. inner transition metals (Lanthanides and Actinides).

18. Isotopes

19. Relative Abundance

20. Relative atomic mass