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

What is the chemical formula for magnesium hydroxide? 

• Mg(OH)₂
• MgOH
• MgOH₂
• Mg₂OH 

What is the correct name for the compound NaNO₃? 

• sodium nitrate 
•  sodium nitrogen trioxide 
• sodium nitrous acid
•  sodium nitrogen oxide

What is the correct chemical formula for magnesium phosphate? 

• Mg₃P
• MgPO₄
• Mg₃PO₄
• Mg₃(PO₄)₂ 

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) 

Magnesium bromide is one of the most abundant compounds found in sea water. Which formula correctly represents magnesium bromide? 

• MgBr
• MgBr₂
• Mg₂Br
• Mg₃Br₂

Metal atoms will most likely form ions by  

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

Which element is most likely to form an ion with a negative 2 charge? 

• oxygen
• nitrogen
• beryllium
• magnesium