1.2 - Isotopes and Ions Flashcards
Terms to Know for Elements, Atoms, and bonding
1
Q
Anion
A
A negatively charged ion
2
Q
Cation
A
A positively charged ion
3
Q
Electron Shell
A
A region or energy level in which similarly energized electrons encircle the nucleus
4
Q
Ion
A
An atom with an electrical charge
5
Q
Isotope
A
One of multiple versions of an atom with a different number of neutrons and mass number
6
Q
Octet Rule
A
The principle that all atoms (NOT HYDROGEN OR HELIUM) are most stable when their valence shell contains eight electrons. **Hydrogen and Helium are most stable with two electrons in their valence shell
7
Q
Radioactive Isotope (radioisotope)
A
An isotope with a nucelus that readily decays, emitting subatomic particles and electromagnetic energy
8
Q
Valence shell
A
The outermost electron shell of an atom
