8.P.1.2 - Vocabulary

1. Periodic Table

A chart of the elements showing the repeating pattern of their properties.

2. Element

A pure substance that cannot be broken down into other substances by chemical or physical means.

3. Model

A systematic description of an object or phenomenon that shares important characteristics with the object or phenomenon. Scientific models can be material, visual, mathematical, or computational and are often used in the construction of scientific theories.

4. Pattern

The regular and repeated way in which something is done.

Patterns found on the periodic table would include:

5. Valence Electron

The number of electrons found in the outer shell.

-These electrons can be gained, lost, or shared during a chemical reaction.

6. Isotope

An atom with the same number of protons and a different number of neutrons from other atoms of the same element.

7. Atomic Number

The number of protons in the nucleus of an atom.

8. Atomic Mass

The average mass of all the isotopes of an element.

9. Vertical Column- Group/Family

Elements in the same vertical column of the periodic table.

18 Columns

10. Horizontal Row- Period

A horizontal row of elements in the periodic table.

7 Rows

11. Physical Property

A characteristic of a pure substance that can be observed without changing it into another substance.

12. Malleability

A term used to describe a material that can be pounded into shapes.

13. Conductivity

The ability of an object to transfer heat or electricity to another object.

14. Reactive

The ease and speed with which an element combines, or reacts, with other elements and compounds.

15. Ductility

A term used to describe a material that can be pulled out into a long wire.