Molecules and Chemical Bonds Quiz

What is a molecule?

• A) A type of atom

• B) A particle made of two or more atoms bonded together

• C) A chemical element

• D) A type of crystal

What is the purpose of a chemical bond?

• A) To show the color of an atom

• B) To hold atoms together in molecules

• C) To dissolve atoms in water

• D) To create extended structures

Which of the following elements is NOT found in a molecule of water (H₂O)?

• A) Oxygen

• B) Hydrogen

• C) Carbon

• D) None of the above

What type of model is used to visually represent molecules?

• A) Geometric model

• B) Ball-and-stick model

• C) Pie chart model

• D) Pyramid model

In a ball-and-stick model, what do the sticks represent?

• A) Atoms

• B) Molecules

• C) Chemical bonds

• D) Crystals

How many natural elements are there?

• A) 50

• B) 92

What does the chemical formula H₂O represent?

• Hydrogen peroxide

• Table salt

• Water

• Ammonia

Which molecule has the chemical formula H₂O₂?

• Water

• Methane

• Hydrogen peroxide

• Glucose

What is the key difference between butane and isobutane?

• Their atomic composition

• Their chemical structure

• Their color

• Their size

What is a crystal?

• A single molecule

• A solid structure with repeating subunits

• A type of chemical bond

• A model of an atom