Exploring the Periodic Table: Periods and Groups

This video tutorial explains the organization of the periodic table, focusing on periods (rows) and groups (columns). Periods indicate the number of electron shells an atom has, while groups show the number of electrons in the outer shell. The video provides a detailed look at how these aspects help understand atomic structure and properties.

What are the rows in the periodic table also known as?

• Periods

• Blocks

• Groups

• Columns

What do the periods in the periodic table tell you about an atom?

• The number of shells or orbitals

• The number of neutrons

• The number of protons

• The number of electrons in the outer shell

How many electrons can the first shell hold?

• 1

• 2

• 8

• 4

Which elements need two shells to hold their electrons?

• Sodium through Argon

• Potassium through Krypton

• Lithium through Neon

• Hydrogen and Helium

How many shells do elements in the third period need?

• 4

• 3

• 2

• 1

What do the groups in the periodic table indicate?

• The number of neutrons

• The number of electrons in the outer shell

• The number of shells

• The number of protons

Which group has elements with one electron in their outer shell?

• Group 18

• Group 1

• Group 2

• Group 17

How many electrons do elements in Group 18 have in their outer shell?

• 18

• 8

• 2

• 1

What is another name for the outer shell of an atom?

• Inner shell

• Nucleus

• Core

• Valence shell

What does the number at the top of a group in the periodic table represent?

• Number of electrons in the outer shell

• Number of protons

• Number of shells

• Number of neutrons