Electrons and Chemical Bonds

Some coins are alloys of zinc and copper. Which type of bond forms in these coins?

• covalent  
• hydrogen
• ionic 
• metallic 

How can two different nonmetals form a compound? 

• by sharing protons
• by sharing electrons
• by transferring protons
• by transferring electrons

Compounds can be classified as covalent or ionic by noting the location on the periodic table for each atom in the compound. Which compound is covalently bonded? 

• sodium chloride (NaCl)
• sulfur dioxide (SO₂)
• potassium bromide (KBr)
•  magnesium chloride (MgCl₂)

Based on its electron configuration, which element will most likely gain electrons from another element when forming an ionic compound?  

• potassium (K)
• vanadium (V)
• iodine (I)
• xenon (Xe) 

Metal atoms will most likely form ions by  

• the loss of electrons.
• loss of protons.
• gain of electrons.
• gain of protons.

Which compound results from covalent bonding?  

• NH₄Cl
• K₂SO₄
• NaCl
• C₆H₁₂O₆ 

Atoms of which two elements will form an ionic bond?  

• Mg and Cl 
• N and O
• Fe and Co
• Rb and Al

An ionic bond is formed through the...  

• transfer of electrons
• sharing of electrons 
• sea of electrons 
•  decay of electrons 

A covalent bond is formed through the... 

• gaining of electrons
•  loss of electrons
•  sharing of electrons
• transfer of electrons 

Marcos and Helen study the electron configurations of neutral atoms. They draw the atomic models shown. Due to their electron structure, what do the two atoms have in common? 

•  family
• period
• mass number
• atomic number