Chemistry Sem1 Pre/Post TEST

What do both covalent bonds and ionic bonds have in common?

• High boiling points.

• Electrons are shared between atoms.

• Hold atoms together to form compounds.

• All compounds interact based on their charges.

What type of bond is likely to form between sodium (Na) and chlorine (Cl)?

• Ionic

• Covalent

• None

• Metallic

What type of bond is likely to form between carbon (C) and oxygen (O)?

• Ionic

• Covalent

• None

• Metallic

What type of bond is likely to form between xenon (Xe) and potassium (K)?

• Ionic

• Covalent

• None

• Metallic

What type of bond is likely to form between magnesium (Mg) and sulfur (S)?

• Ionic

• Covalent

• None

• Metallic

What type of bond is likely to form between hydrogen (H) and nitrogen (N)?

• Ionic

• Covalent

• None

• Metallic

What type of bond is likely to form between phosphorous (P) and bromine (Br)?

• Ionic

• Covalent

• None

• Metallic

Consider the model shown below: What type of bond is made of the elements above and what is the formula?

• The bond will be ionic because magnesium is a nonmetal and chlorine is a metal. The formula will be MgCl because the charge on magnesium is +2 and the charge on Cl is -1.

• The bond will be ionic because magnesium is a metal and chlorine is a nonmetal. The formula will be MgCl₂ because the charge on magnesium is +2 and the charge on Cl is -1.

• The bond will be covalent because both magnesium and chlorine are nonmetals. The formula will be MgCl because the charge on magnesium is +2 and the charge on Cl is -1.

• The bond will be covalent because both magnesium and chlorine are nonmetals. The formula will be MgCl₂ because the charge on magnesium is +2 and the charge on Cl is -1.

The compound formed has a(n) _______ bond and is a(n) _______.

• ionic, crystalline solid

• covalent, amorphous solid

• metallic, liquid

• hydrogen, gaseous

The images below are models of different types of bonding. Which figure represents an ionic formula unit?

• A and B, because polar molecules share electrons.

• B, because polar molecules transfer electrons creating a positive cation and negative anion.

• C, because polar molecules unevenly share electrons and make partial positive and negative charges.

• B, because ionic compounds transfer electrons