Pre AP Chemistry 5.1: Intro to Lewis Diagrams

What are the circular paths that electrons are organized into within an atom called?

• Orbits

• Energy levels (shells)

• Nuclei

• Electron clouds

How many electrons can the first energy level or shell of an atom hold?

• One

• Two

• Eight

• Sixteen

In the periodic table, what does the number at the top of an element's box (like '1' for Hydrogen) primarily indicate?

• The number of electrons

• The number of neutrons

• The number of protons

• The atomic mass

Assuming a Hydrogen atom is neutral, how many electrons does it possess?

• Zero

• One

• Two

• Three

How many electrons are in the outermost energy level of a neutral Lithium atom?

• 1

• 2

• 3

• 8

What is the electron configuration of a neutral Sodium atom?

• 1s²2s²

• 1s²2s²2p⁶3s¹

• 2p⁶2s¹

• 3s²

What are valence electrons?

• Electrons closest to the nucleus

• Electrons in the innermost energy level

• Electrons in the outermost energy level

• All electrons in an atom

How many valence electrons do elements in the second column of the periodic table typically have?

• 1

• 2

• 3

• 8

How many valence electrons do elements in the second column of the periodic table (like Beryllium and Magnesium) typically have?

• 1

• 2

• 3

• 4

How many valence electrons are found in elements like Boron and Aluminum?

• 2

• 3

• 4

• 5