Study Notes
The Periodic Table organizes over 100 chemical elements by increasing atomic number, placing elements with similar properties in the same columns, known as groups, and rows, known as periods. Elements are substances made of atoms with the same number of protons and cannot be split into simpler substances. Each element is represented by a unique chemical symbol, often derived from its English or Latin name.
Exam Tips
Key Definitions to Remember
- Element: A substance made of atoms with the same number of protons.
- Group: Vertical columns in the periodic table showing the number of outer electrons.
- Period: Horizontal rows in the periodic table indicating the number of electron shells.
Common Confusions
- Confusing group numbers with period numbers.
- Misunderstanding the difference between atomic number and mass number.
Typical Exam Questions
- What is a group in the periodic table? A vertical column showing the number of outer electrons.
- How are elements arranged in the periodic table? By increasing atomic number.
- What is the chemical symbol for sodium? Na
What Examiners Usually Test
- Understanding of how elements are organized in the periodic table.
- Ability to identify and use chemical symbols correctly.
- Differences between metals and non-metals in terms of properties.