SL Chemistry- Reactivity 1.3 and Structure 2.4

What role does chemistry play in the development of materials?

• It has no role.

• It helps discover and create materials.

• It is only important for theoretical studies.

• It only focuses on organic substances.

Which of the following is an example of a modern material mentioned in the video?

• Greek armor

• Kevlar

• Wood

• Stone

What is the primary model that describes how atoms bond by sharing electrons?

• Ionic model

• Covalent model

• Metallic model

• Polymer model

Which bond type is characterized by the transfer of electrons?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

What does the bonding triangle help scientists predict?

• The color of materials

• The properties of materials

• The history of materials

• The cost of materials

What is electronegativity a measure of?

• The weight of an atom

• The tendency of an atom to gain electrons

• The size of an atom

• The temperature of an atom

Which compound falls into the ionic bonding range in the bonding triangle?

• Methane (CH₄)

• Calcium oxide (CaO)

• Manganese(II) chloride (MnCl₂)

• Water (H₂O)

What are alloys primarily created to enhance?

• Color

• Chemical stability

Which of the following is a common example of an alloy?

• Plastic

• Stainless steel

• Glass

• Wood

What is the largest synthetic polymer?

• Polyethylene

• Titan

• PVC

• Rubber