5.2 Arranging the Elements

How many periods are there on a periodic table?

• 5

• 6

• 7

• 8

What is the significance of the horizontal rows in the periodic table?

• They are called groups.

• They are called periods.

• They are called blocks.

• They are called sections.

Which of the following best describes the arrangement of elements in the periodic table?

• Randomly

• By their atomic number in rows and columns

• By their mass number in a circular pattern

• By their density in rows only

What does the periodic table arrange elements into?

• Rows only

• Columns only

• Rows and columns

• Circular patterns

In the Bohr Model, what is the maximum number of electrons that the third energy level (shell) can accommodate?

• 8

• 18

• 24

• 32

Which energy level (shell) can hold a maximum of 8 electrons according to the Bohr Model?

• 1

• 2

• 3

• 4

In the Bohr Model, what is the maximum number of electrons that the fourth energy level (shell) can accommodate?

• 8

• 18

• 24

• 32

Which energy level (shell) can hold a maximum of 2 electrons according to the Bohr Model?

• 1

• 2

• 3

• 4

What are the rows in a periodic table called?

• Groups

• Periods

• Columns

• Sections

How many valence electrons does Group 2 have?

• 1

• 2

• 3

• 4