Unit 4: Chemical Bonding

Daniel, Emma, and Ava are learning about ionic bonds in chemistry class. Their teacher explains that ionic bonds form for what reason?

• so the number of protons equals the number of electrons

• to fill the outermost energy level

• so an atom can become unstable

An electron has what kind of charge?

• no charge
• positive 
• negative
• it depends

Valence electrons are those in the ______ energy level of an atom.

• innermost
• outermost
• middle

A charged atom is also called a(n) ______.

• ion
• isotope
• compound
• polyatomic compound

All of the elements in the same group (column) have EQUAL #s of _______.

• Protons
• Neutrons
• Electrons
• Valence Electrons

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5
• 1

If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge?

• Al³⁺
• Al¹³⁺
• Al¹⁰⁺
• Al^10-

If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?

• O^10-
• O⁸⁺
• O^2-
• O¹⁰⁺

What are ionic bonds?

• valence electrons transferred between atoms
• Inner most electrons transferred between atoms

The ______ rule explains that atoms combine in such a way that each atom typically has eight electrons in its valence shell.

• octet
• bonding
• triplet
• covalent