Understanding Atoms, Molecules, and Compounds

Maya is studying chemistry and wonders, what is the smallest part of an element?

• Molecule

• Atom

• Compound

• Element

Zoe is studying chemistry and wants to know which of the following is an example of a monoatomic element?

• Ozone

• Water

• Helium

• Hydrogen

Mia is studying chemistry and comes across the term "diatomic". What does this term refer to?

• A molecule composed of two different types of atoms

• A molecule composed of two atoms of the same element

• A single atom

• A compound with three atoms

Luna is studying chemistry and comes across the term 'compound'. What does it mean?

• A type of atom

• A molecule with different types of atoms

• A mixture of elements

• An individual element

During a science class, Michael asked, what does the chemical formula H2O represent?

• Two oxygen atoms

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and two oxygen atoms

• A compound without hydrogen

During a science experiment, Samuel and Priya are trying to understand what type of compound is formed when metals combine with nonmetals.

• Molecular compound

• Ionic compound

• Diatomic compound

• Polyatomic compound

During a chemistry class, Anika asked, "Which of the following compounds is formed by carbon and oxygen?"

• Sodium chloride

• Magnesium oxide

• Carbon dioxide

• Zinc oxide

In a science class, Elijah is curious about how the properties of water compare to the properties of the hydrogen and oxygen gases that make it up.

• They remain the same

• They are always greater

• They can be different

• They are always lesser

Nora is conducting an experiment with water. How many hydrogen atoms are there in a water molecule?

• One

• Two

• Three

• Four

Nora is conducting an experiment in her chemistry class. She needs to identify which element among the following is classified as a non-metal.

• Magnesium

• Oxygen

• Sodium

• Iron