Electronic Structure and Periodic Trends

The video tutorial explains electronic structure diagrams, focusing on the arrangement of electrons in shells around an atom's nucleus. It covers the capacity of each shell and provides examples using calcium and sodium. The tutorial also explores patterns in the periodic table, highlighting how elements in the same group have similar outer shell electron counts. It concludes with methods to identify elements based on their electron configuration and group characteristics.

What is found at the center of an atom?

• Electrons

• Nucleus

• Protons

• Neutrons

How many electrons can the first electron shell hold?

• Two

• Four

• Six

• Eight

What is the electronic structure of a calcium atom?

• 2, 8, 8, 2

• 2, 8, 1

• 2, 8, 2

• 2, 8, 8

How many electrons does a sodium atom have?

• 10

• 11

• 12

• 13

Which element has an electronic structure of 2, 8, 1?

• Hydrogen

• Calcium

• Sodium

• Silicon

What pattern is observed as you move from left to right across the periodic table?

• The number of electron shells decreases

• The number of electrons increases by one

• The number of neutrons increases

• The number of protons decreases

How many electron shells do elements in Period two have?

• Four

• Three

• One

• Two

Which group of elements has a full outer shell?

• Group 0 or Group 8

• Group 3

• Group 2

• Group 1

If an element has three electron shells and four electrons in its outer shell, which group and period is it in?

• Group 3, Period 2

• Group 4, Period 3

• Group 2, Period 3

• Group 4, Period 2

What is the electronic structure of silicon?

• 2, 8, 4

• 2, 8, 8

• 2, 8, 1

• 2, 8, 2