Element vs Compound Quiz

Acids and Bases

• The pH of bases is greater than 7, indicating a higher concentration of hydroxide ions (OH-).
• Neutralization reaction: Acid (HCl) + Base (NaOH) → Salt (NaCl) + Water (H2O)

Combustion

• Complete combustion: A combustion reaction that produces only carbon dioxide and water as products, with no leftover fuel.
• Incomplete combustion: A combustion reaction that produces carbon monoxide, carbon dioxide, and water as products, with leftover fuel.

Physical Properties

• Qualitative physical properties: Characteristics of a substance that can be observed and described, such as color, odor, and texture.

Ions

• Polyatomic ion: A group of atoms bonded together with a net electric charge, such as sulfate (SO42-).

Elements and Compounds

• Element: A substance that consists of only one type of atom, such as hydrogen (H) or carbon (C).
• Compound: A substance that consists of two or more different elements, such as water (H2O) or carbon dioxide (CO2).
• Example: Hydrogen (H) is an element, while water (H2O) is a compound.

Atoms and Ions

• Atom: A tiny particle that consists of protons, neutrons, and electrons, and is the building block of matter.
• Ion: An atom or group of atoms that has gained or lost electrons, resulting in a net electric charge.

pH Scale

• pH scale: A scale that measures the acidity or basicity of a solution, ranging from 0 to 14.
• pH range: Acidic (pH 0-7), Neutral (pH 7), and Basic (pH 7-14).

Acids and Bases

• Acids: Substances that donate a hydrogen ion (H+), increasing the concentration of H+ ions in a solution.
• Bases: Substances that accept a hydrogen ion (H+), decreasing the concentration of H+ ions in a solution.