Basic Agricultural Chemistry is one of 9 topics in the Grade 11 Agricultural 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. What is the atomic number of an element?
The number of protons in its nucleus
The number of neutrons in its nucleus
The total mass of the atom
The number of electron shells
Answer: The number of protons in its nucleus — The atomic number is the number of protons in an atom's nucleus, and this number determines which element the atom is.
Easy
2. Name the negatively charged particle found in energy levels (shells) surrounding the nucleus of an atom.
Answer: electron — Electrons are negatively charged particles arranged in energy levels (shells) around the nucleus of an atom.
Medium
3. Two atoms of the same element have the same number of protons but a different number of neutrons. What are these atoms called?
Isotopes
Ions
Isomers
Valence atoms
Answer: Isotopes — Isotopes are atoms of the same element (same number of protons) that have a different number of neutrons, and therefore a different atomic mass.
