Elements/Atoms Flashcards
1
Q
atomic number equals…?
A
number of protons
2
Q
Mass number equals…?
A
Number of protons and number of neutrons
3
Q
Mass number minus atomic number equals…?
A
Number of neutrons
4
Q
Outer electron shell/orbital
A
Valence electrons
5
Q
Ions
A
The # of p does not equal # of e, electrons change
6
Q
Cation
A
Positively charged atoms #p > #e
7
Q
anion
A
Negatively charged atoms #p < #e
8
Q
Isotopes
A
The mass of the atom has changed, but protons stay same- neutrons change. Electrons stay same
9
Q
Chemical (molecular) formula
A
Number of atoms for each element
10
Q
Structural formula
A
How the atoms are bonded
11
Q
Molecular model
A
The model of the molecule
12
Q
Structural isomer
A
Same chemical formula but different structural formula
