Atoms and Molecules Quiz

What is the smallest particle of an element?

• Atom

• Molecule

• Compound

• Ion

Answer explanation

The smallest particle of an element is an atom, which is the correct choice among the options provided.

Which of the following is a pure substance made from only one type of atom?

• Element

• Particle

• Compound

• Molecule

Answer explanation

An element is a pure substance made from only one type of atom, distinguishing it from compounds or mixtures.

Evaluate the statement: "All atoms of an element look exactly the same."

What are the fundamental components of all matter?

• Compounds

• Atoms

• Ions

• Molecules

Answer explanation

The building blocks of everything are atoms, which are the smallest units of matter that retain the properties of an element.

How many different types of pizzas are listed on the menu?

• 92

• 118

• 64

• 150

Answer explanation

There are 118 different elements listed on the periodic table, making 118 the correct choice.

Which of the following elements is commonly used in balloons?

• Oxygen

• Hydrogen

• Carbon

• Helium

Answer explanation

Oxygen is a non-metal element based on its properties in the periodic table.

What is the chemical formula of water?

• H

• O₂

• HO

• H₂O

Answer explanation

The chemical formula of water is H₂O, which represents two hydrogen atoms bonded to one oxygen atom.

What is the chemical formula of carbon dioxide?

• CO

• CO₂

• C₂O

• C₂O₂

Answer explanation

The chemical formula of carbon dioxide is CO₂, where the '₂' subscript indicates two oxygen atoms bonded to one carbon atom.

Which substance is commonly known as H2O?

• Methane

• Oxygen

• Water

• Carbon Dioxide

Answer explanation

The molecule made up of two oxygen atoms bonded together is Oxygen.