What is the smallest subatomic particle in an atom that carries a unit negative electrical charge?
Answer and explanation
Correct answer: B. Electron
- Step 1: Electrons are fundamental subatomic particles with a charge of -1 that orbit the atomic nucleus in shells. Step 2. Their mass is negligible (approx 1/1836 of a proton) compared to nucleons. Answer: Electron. Why not the others: Protons carry a positive charge (+1); neutrons are neutral (0 charge); positrons are antimatter particles.
Practise more Living Things and Life Processes.
Free questions with an explanation for every one, and full timed Basic Education Certificate Examination mock tests.
More Living Things and Life Processes questions
- Which cellular organelle is responsible for generating aerobic chemical energy (ATP) in eukaryotic cells?
- Which of the following cellular structures is present in plant cells but strictly absent in animal cells?
- What is the primary green pigment in plant leaves that absorbs sunlight for photosynthesis?
- Which gas is released into the atmosphere as a major byproduct of the light reaction of photosynthesis?
- By which physical process do water molecules move across a selectively permeable membrane from higher to lower water potential?
- What is the basic functional filtering unit of the human kidney responsible for producing urine?