S1 Final Exam Review

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

Which of the following is NOT a pure substance: Water, Milk, Oxygen, Carbon Dioxide?

Back

Milk is not a pure substance; it is a heterogeneous mixture.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not distinguishable.

Front

True or False: A homogeneous mixture contains only one type of atom.

Back

False. A homogeneous mixture can contain multiple types of atoms or molecules.

Front

What is a safe laboratory procedure when working in a lab?

Back

Tying back long hair and loose clothing is a safe laboratory procedure.

Front

True or False: The nucleus contains the majority of an atom’s mass.

Back

True. The nucleus, which contains protons and neutrons, accounts for most of an atom's mass.

Front

What are the building blocks of matter?

Back

Atoms are the building blocks of matter.

Front

Define an atom.

Back

An atom is the smallest unit of an element that retains the properties of that element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.