Valence Electrons and Periodic Table Groups

The video tutorial explains the concept of valence electrons, focusing on aluminum, which is in group 13 or 3A of the periodic table. It highlights the importance of valence electrons in forming chemical bonds and how the periodic table's group numbers indicate the number of valence electrons for each element. The tutorial skips transition metals and details the valence electrons for groups 1 to 18, emphasizing aluminum's three valence electrons. Finally, it demonstrates how to represent aluminum's valence electrons using the Lewis Dot Structure.

Which group does aluminum belong to in the periodic table?

• Group 1 or 1A

• Group 18 or 8A

• Group 2 or 2A

• Group 13 or 3A

What is the significance of valence electrons in chemistry?

• They determine the atomic mass.

• They are involved in forming chemical bonds.

• They define the element's color.

• They are responsible for the element's state of matter.

How many valence electrons does an element in group 2 or 2A have?

• Two

• One

• Four

• Three

Which group in the periodic table has elements with eight valence electrons?

• Group 18 or 8A

• Group 14 or 4A

• Group 13 or 3A

• Group 1 or 1A

What is the group number for elements with four valence electrons?

• Group 18 or 8A

• Group 13 or 3A

• Group 14 or 4A

• Group 2 or 2A

What is the Lewis Dot Structure used for?

• To determine the element's density.

• To calculate the molecular weight.

• To represent the valence electrons around an element's symbol.

• To show the atomic number of an element.

How many valence electrons does aluminum have?

• Four

• Three

• Two

• One