Unit 4.2 - Arranging the Elements Flashcards
1
Q
Groups
A
Vertical columns of the periodic table; group number is equal to the number of electrons in the outer shell of atoms of the elements in that group
2
Q
Actinides
A
Special block of metallic elements with atomic numbers 90-103
3
Q
Lanthanides
A
Special block of metallic elements with atomic numbers 58-71
4
Q
Transition Elements
A
Special block of metallic elements covering elements 3-12
5
Q
Periods
A
Horizontal rows of the periodic table; period number of an element is equal to the number of electron shells
6
Q
Periodic Table
A
Table of known elements
