Chapter 11

Question 1

Devised first periodic table based on atomic mass

Answer 1

Mendelev

Question 2

Arrange elements by atomic number

Answer 2

Moseley

Question 3

Vertical columns with smaller properties (1-18)

Answer 3

Groups/families

Question 4

Horizontal rows with increasing number of protons and electrons (1-7)

Answer 4

Periods

Question 5

Most elements are ________

Answer 5

Metals(75%)