Unit 6 Notes Check

What do atoms form when they are joined by chemical bonds?

• Elements

• Compounds

• Mixtures

• Solutions

What is the significance of the positive pole in a polar covalent bond?

• It attracts more electrons

• It repels electrons

• Electrons are less likely to be found there

• It has no charge

What is an anion?

• A positive ion

• A neutral atom

• A negative ion

• A molecule

What tends to happen to metals in terms of electron transfer?

• They gain electrons

• They lose electrons

• They share electrons

• They remain unchanged

What is the electronegativity difference range for a nonpolar covalent bond?

• 0.0 to < 0.4

• 0.4 to < 1.7

• 1.7 and > 1.7

• 0.5 to 1.0

What is the first step in writing electron dot diagrams for ionic compounds?

• Draw the compound structure

• Write the dot diagram for each atom separately

• Combine the atoms

• Calculate the total electrons

What is the electronegativity difference for covalent bonding?

• High, >2.0

• Low, <1.7

• Moderate, 1.7-2.0

• Very high, >3.0

Which type of elements usually compose covalent compounds?

• Metals only

• Nonmetals or metalloid and a nonmetal

• Metals and nonmetals

• Metalloids only

Which of the following is an example of a gas mentioned?

• C6H12O6

• CH4

• Butter

• Wax

What is the result of the pull on electrons from the central atom in a linear molecule?

• The molecule becomes polar

• The molecule becomes nonpolar

• The molecule becomes ionic

• The molecule becomes metallic