Bonding Review

How many valence electrons are in an Mg atom?

• 1
• 2
• 12
• 24

How can you tell how many valence electrons are in a main group element?

• Guess
• By the atomic number
• By the group number
• By the mass

What is a valence electron?

• An electron closest to the nucleus
• An electron in the highest energy level
• An electron in the nucleus
• A proton

An ion forms when an atom gains or loses _________.

• electrons
• protons
• neutrons
• protons and neutrons

Which of the following is not a noble gas? 

• Ar
• He
• Ne
• Br

Why do atoms form chemical bonds?

• No reason
• To become more stable
• To lose all their electrons
• To get more protons

An anion is an atom that has a ______ charge and is formed when electrons are __________.

• positive, lost
• positive, gained
• negative, lost
• negative, gained

A cation is an atom that has a ______ charge and is formed when electrons are __________.

• negative, gained
• negative, lost
• positive, gained
• positive, lost

To form an ionic bond, electrons are _________.

• transferred
• shared
• transhared
• shransferred

A covalent bond is formed when atoms _______ electrons.

• transfer
• share