Elements, Compounds, and Mixtures Quiz

What is the smallest unit of a substance?

Which of these compounds contains two hydrogen atoms?

What type of substances make up a mixture?

What is a key characteristic of compounds compared to their constituent elements?

Which of the following correctly describes a chemical formula?

Which of the following elements is represented by the symbol 'C'?

Water is classified as which type of substance?

What process can be used to separate components of a mixture?

What does the suffix 'ide' indicate in the naming of compounds?

In the compound name 'Carbon tetrachloride', how many chlorine atoms are present?

What prefix is used when there are three atoms of an element in a compound?

Which of the following correctly describes the compound name 'Carbon monoxide'?

What is the chemical formula for Carbon dioxide?

How many different types of atoms are in a molecule of water (H2O)?

Which prefix is used to denote two atoms of an element in a compound?

What can you infer from the naming convention of 'Carbon monoxide'?

Elements, Compounds, and Mixtures

Elements are pure substances that cannot be broken down.
- A list of elements is called the Periodic Table.
Elements can form compounds.
- Different elements combine to create compounds.
Each element has a symbol (found on the periodic table).
- Examples include: C - Carbon, H - Hydrogen, O - Oxygen, Na - Sodium.
- Many element names originate from Latin.
Atoms are the smallest unit of a substance.
- Atoms are microscopic and have three basic parts: protons, neutrons, and electrons.
- Protons and neutrons are located in the nucleus (centre of the atom).
- Electrons orbit the nucleus in electron shells.

Compounds

Small groups of atoms are called molecules.
- Larger structures are called lattices.
- Atomic bonds hold the atoms together.
- Example: Water (H₂O), Oxygen (O₂), Carbon Dioxide (CO₂).
A compound is made up of identical molecules or lattices.
- Compounds often have different properties than the elements they contain.
Compound formulas show how atoms combine.
- Example: Water (H₂O) is made from 2 hydrogen atoms and 1 oxygen atom.
- Another example: Table salt (NaCl) is made from 1 sodium atom and 1 chlorine atom.

Mixtures

A mixture contains two or more substances.
- These substances are not bonded together.
- No new substance is formed from a mixture.
Mixtures can be separated.
- Examples of separation methods include filtration and evaporation.

Test your knowledge on the basics of elements, compounds, and mixtures. This quiz covers the properties of pure substances, the significance of the periodic table, and the structure of atoms and molecules. Challenge yourself to understand how elements combine to form compounds and the characteristics that define them.