Chemical Bonding Exam

The part of the atom responsible for chemical bonding is:

• Protons

• Neutrons

• Electrons

• Nucleus

Valence electrons are the electrons that are located in the outermost electron shell of an atom. They are important in determining how the atom interacts chemically with other atoms.

• Valence electrons are found in the innermost electron shell of an atom.

• Valence electrons are the electrons that are located in the outermost electron shell of an atom.

• Valence electrons are the protons in the nucleus of an atom.

• Valence electrons are the neutrons in the nucleus of an atom.

Valence electrons are located in the:

• innermost electron shell

• outermost electron shell

• nucleus of the atom

• middle electron shell

How many valence electrons do most atoms need to have a complete outer shell and be happy?

• 2

• 4

• 6

• 8

Which two elements only need two valence electrons to be happy?

• Helium and Neon

• Hydrogen and Helium

• Lithium and Beryllium

• Boron and Carbon

The elements you named in #5 only need two valence electrons because:

• They have a full outer shell with two electrons.

• They can form two bonds.

• They are metals.

• They are non-metals.

How many valence electrons do elements in Group 1, the Alkali Metals, have?

• 1

• 2

• 3

• 4

Elements in Group 2, the Alkaline Earth Metals, have how many valence electrons?

• 1

• 2

• 3

• 4

Complete the chart: Group Number 13, 14, 15, 16, 17, 18 - Number of valence electrons

• Group 13: 3, Group 14: 4, Group 15: 5, Group 16: 6, Group 17: 7, Group 18: 8

• Group 13: 2, Group 14: 3, Group 15: 4, Group 16: 5, Group 17: 6, Group 18: 7

• Group 13: 1, Group 14: 2, Group 15: 3, Group 16: 4, Group 17: 5, Group 18: 6

• Group 13: 4, Group 14: 5, Group 15: 6, Group 16: 7, Group 17: 8, Group 18: 9

Ions form when:

• atoms gain or lose electrons

• atoms share electrons

• atoms split into smaller particles

• atoms combine to form molecules