Atomic Structure Answer Key
Build atoms and understand how protons, neutrons, and electrons determine element identity.
Looking for Atomic Structure answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Atomic Structure Gizmo.
✅ 100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026
Subatomic Particles
Q1.Where are electrons located?
In electron shells (energy levels) surrounding the nucleus.
Q2.What determines an element's identity?
The number of protons (atomic number). Carbon always has 6 protons.
Q3.What are isotopes?
Atoms of the same element with different numbers of neutrons. Example: Carbon-12 and Carbon-14.
Electron Configuration
Q4.How many electrons fit in the first shell?
Q5.How many electrons fit in the second shell?
Q6.What are valence electrons?
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