Term
|
Definition
| Smallest Particle of an element |
|
|
Term
|
Definition
| A pure substance that contains only one kind of atom |
|
|
Term
|
Definition
| A positive particle found in the nucleus of an atom. |
|
|
Term
|
Definition
| A particle found in the nucleus of an atom that has no charge. |
|
|
Term
|
Definition
| The negatively charged particle found in an atom |
|
|
Term
|
Definition
The small, dense, central core of an tom.
|
|
|
Term
|
Definition
| Orbits found outside the nucleus of an atom in which electrons travel. |
|
|
Term
|
Definition
| The mass of a single proton or neutron; amu. |
|
|
Term
|
Definition
| The number of protons in the nucleus of an atom. |
|
|
Term
|
Definition
| The total number of protons and neutrons in the nucleus of an atom; it is found by rounding off the atomic mass to the nearest whole number. |
|
|
Term
|
Definition
| The sum of the relative masses of the protons and neutrons in an atom. |
|
|
Term
|
Definition
| Atoms of the same element that have a different number of neutrons. |
|
|
Term
|
Definition
| An atom or group of atoms that have an electric charge as the result of losing or gaining electrons. |
|
|
Term
|
Definition
| The organization of the element similar elements are grouped in horizontal rows (periods) and vertical columns (groups). |
|
|
Term
|
Definition
| A horizontal (<----->) Row of elements in the periodic table; 7 rows = 7 periods. |
|
|
Term
|
Definition
| Sets of elements arranged in vertical columns in the periodic table: 18 groups: groups are often called families. |
|
|
Term
|
Definition
| Elements that tend to LOSE electrons easily; they are located on the left of the staircase on the periodic table. |
|
|
Term
|
Definition
| Elements that tend to GAIN electrons easily; they are located on the right of the staircase on the periodic table. |
|
|
Term
|
Definition
| Substances that exhibit some, but not all, of the properties of metals. |
|
|
