Term
|
Definition
| Substance made up of only one kind of atom. |
|
|
Term
|
Definition
| Columns going up and down the periodic table. Elements in a family have similar proerties. Also called a group. |
|
|
Term
|
Definition
| The rows going across the periodic table. Atomic numbers increase by 1 as you go down each period. |
|
|
Term
|
Definition
| Columns going up and down the periodic table. Elements in a group have similar proerties. Also called a family. |
|
|
Term
|
Definition
| The place in an atom where electrons are likely to be. All elements in the same period have the same energy levels. |
|
|
Term
|
Definition
| Found on the LEFT of the periodic table. |
|
|
Term
|
Definition
| Found on the right of the periodic table. |
|
|
Term
|
Definition
| Created the first periodic table. |
|
|
Term
|
Definition
| Abbreviation for an element. |
|
|
Term
|
Definition
| The number of protons and neutrons in one atome of an element. |
|
|
Term
|
Definition
| Number of protons in one atom of an element. Elements are placed on the periodic table in order of their atomic numbers. |
|
|
Term
|
Definition
| The average mass of all known isotopes of an element. |
|
|
