The Atom Flashcards
1
Q
Atomic number
A
Number of protons
2
Q
Mas number of atom
A
The number of protons plus neutrons in an atom
3
Q
Isotope
A
Atoms of the same element which have different mass number
4
Q
Ion
A
A charged atom
5
Q
Cation
A
Positively charged ion
6
Q
Anion
A
Negatively charged ion
7
Q
Valence electrons
A
Electrons in the outermost energy level
