Chemistry concepts that explain the composition and behaviour of matter •

What is the smallest unit of an element that retains its chemical properties?
Which particle in the atom has a negative charge?
What is the term for a substance made up of two or more different elements chemically bonded together?
Which type of chemical bond involves the sharing of electron pairs between atoms?
What is the pH scale used to measure?
What do we call a substance that speeds up a chemical reaction without being consumed?
Which element is represented by the symbol “O” and is essential for respiration?
What is the process called when a solid changes directly into a gas?
Which law states that mass is neither created nor destroyed in a chemical reaction?
What is the term for a mixture where particles are evenly distributed and appear uniform throughout?