Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Atom |
The smallest particle of an element that retains all the properties of that element. |
Spherically shaped; composed of electrons, protons, & neutrons |
|
|
Atomic Mass |
The weighted average mass of isotopes of that element. |
|
|
|
Atomic Number |
The number of protons in an atom |
|
|
|
Dalton's Atomic Theory |
States that matter is composed of extremely small particles called atoms; Atoms are invisible & indestructible; Atoms of a given element are identical in size, mass, & chemical properties. Atoms of a specific element are different from those of another element; different atoms combine in simple whole-number ratios to form compounds. In a chemical reaction atoms are separated, combined, or rearranged. |
|
|
|
Electron |
A negatively charged, fast moving particle with an extremely small mass that is found in all forms of matter & moves through the empty space surrounding an atoms nucleus. |
|
|
|
Mass Number |
The number after an elements name representing the sum of its protons & neutrons. |
|
|
|
Neutron |
A neutral, subatomic particles in an atoms nucleus that has a mass nearly equal to that of a proton. |
|
|
|
Nucleus |
The extremely small, positively charged, dense center of an atom that contains positively charged protons & neutral neutrons. |
|
|
|
Isotopes |
Atoms of the same element with different numbers of neutrons |
|
|
|
Protons |
A subatomic particle in an atom's nucleus that has a positive charge of 1+ |
|
