This common misconceptions covers Common Misconceptions within Atomic Structure for GCSE Physics. Revise Atomic Structure in Atomic Structure for GCSE Physics with 13 exam-style questions and 25 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 8 of 12 in this topic. Use this common misconceptions to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 8 of 12
Practice
13 questions
Recall
25 flashcards
⚠️ Common Misconceptions
Misconception 1: "The mass number includes electrons"
Electrons have negligible mass (about 1/1836 of a proton). The mass number counts only protons and neutrons. Electrons are not included because they contribute essentially zero to the atom's mass.
Misconception 2: "Isotopes of the same element have different chemical properties"
Isotopes have the same number of electrons, so they have identical chemical properties. Chemical reactions depend on electron configuration, not the number of neutrons. Carbon-12 and Carbon-14 react identically in chemistry labs.
Misconception 3: "The atomic number can change while keeping the same element"
The atomic number is what DEFINES an element. If the number of protons changes, you get a completely different element. Only the number of neutrons can vary (creating isotopes) while keeping the element the same.