Energy Levels & Electronic Configuration

The video tutorial explains the structure of an atom, focusing on protons, neutrons, and electrons. It describes how electrons are organized in shells or energy levels around the nucleus, with specific examples of elements like lithium, carbon, and magnesium. The tutorial also covers how electron configurations determine an element's reactivity and its group on the periodic table.

What is the relationship between protons and electrons in a neutral atom?

• Protons are always more than electrons

• Protons and electrons are unrelated

• Electrons are always more than protons

• The number of protons equals the number of electrons

How many electrons can the first energy level hold?

• Eight

• Two

• Six

• Four

In a dot and cross diagram, what do the circles around the nucleus represent?

• Protons

• Neutrons

• Energy levels

• Chemical bonds

What is the electronic configuration of Carbon?

• C 2/2

• C 2/8

• C 2/4

• C 2/1

How does the number of electrons in the outer shell affect an element's properties?

• It affects the element's reactivity and group in the periodic table

• It changes the element's atomic mass

• It determines the element's color

• It alters the element's melting point