Compounds and Chemical Reactions is one of 9 topics in the Grade 9 Natural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Into which three broad categories can elements on the Periodic Table be classified?
Metals, non-metals and semi-metals
Solids, liquids and gases
Acids, bases and neutrals
Compounds, mixtures and elements
Answer: Metals, non-metals and semi-metals — The elements can be classified into three broad categories: metals, non-metals and semi-metals, based on their shared properties.
Easy
2. What is a vertical column on the Periodic Table called?
A group
A period
A block
A row
Answer: A group — The vertical columns of the Periodic Table are called groups, and elements in the same group share similar chemical properties.
Medium
3. Name the number, found on an element's block, that tells you how many protons its atom has.
Answer: the atomic number — The atomic number (the smaller number on an element's block) tells you how many protons the atom has.
