3 Chemical Bonding

What isn't the type of chemical bond?

• ionic bonding

• covalent bonding

• metallic bonding

• lewis bonding

How many electrons are needed to form a double bond?

• 2

• 4

• 6

• 8

What are the properties of ionic compounds?

• Low melting points

• Poor conductors of electricity

• Poor solubility in water

• Definite crystalline structure

What factor determines the ratio of cations to anions in an ionic compound's crystal lattice?

• Size of the ions

• Charge of the ions

• Separation of like charges

• Separation of unlike charges

What does electron shift in polar covalent bonds cause?

• No charge separation

• Equal electron distribution

• Partial charges at molecule ends

• Chargeless molecule

Which statement is true regarding the central atom in a Lewis structure?

• It is the most electronegative element.

• It is hydrogen, due to its bonding capabilities.

• It is the least electronegative element, except hydrogen.

• It is determined after arranging the other atoms.

What is a molecule?

• A group of atoms bonded together, which must be different elements.

• Two or more atoms bonded together by covalent bonds.

• Two or more atoms bonded together by ionic bonds.

• A type of chemical bond between atoms.

What causes ionic compounds to have high melting points?

• Complex molecules.

• Weaker particle forces.

• Strong lattice networks needing more energy to break.

• Stronger ion-ion attractions in non-ionic compounds.

What characteristic of metallic bonds contributes to metals being malleable and ductile?

• Fixed cation positions

• Rigid electron structure

• Flexible "sea" of electrons

• Cation disconnection under force

What tool helps chemists determine molecular structures?

• Periodic table

• Coulombic forces

• Lewis structures

• Proton count