Chapter 2.2 Flashcards
0
Q
Periodic Table
A
Chart to organize elements by their chemical and physical properties.
1
Q
Dmitri Mendeleev
A
Created modern periodic table
2
Q
Atomic number
A
Number of protons in the nucleus of an atom
ALWAYS a whole number
3
Q
atomic mass
A
Average atomic mass.
Always a decimal.
Measured in atomic mass units (amu)
4
Q
Ion charge
A
Electric charge that forms on an atom when it gains or looses electrons
5
Q
Multiple Ion Charge
A
Elements that can form ions in more than one way
6
Q
Metalloids
A
Have some of the properties of metals and some of the properties of nonmetals
7
Q
Period
A
A row across on the periodic table
8
Q
Chemical family
A
A vertical column where the elements have similar chemical or physical properties.
