Chapter 11 Flashcards
1
Q
Devised first periodic table based on atomic mass
A
Mendelev
2
Q
Arrange elements by atomic number
A
Moseley
3
Q
Vertical columns with smaller properties (1-18)
A
Groups/families
4
Q
Horizontal rows with increasing number of protons and electrons (1-7)
A
Periods
5
Q
Most elements are ________
A
Metals(75%)
