Opening your next discovery…
Which particle change alters an element, an isotope or an ion?
Your discovery goalUse protons, neutrons and electrons to determine atomic number, mass number and charge.
Mapping checkedA prediction is a starting idea. You can revise it after exploring.
Use at least 40 characters and include an observation. Your writing is saved as evidence; it is not automatically judged for accuracy.
This records completion of this demonstration. It is not an official grade or a claim of mastery.
Construct particle-count models and separate nucleon count from charge.
Use protons, neutrons and electrons to determine atomic number, mass number and charge.
State what you changed. Describe the result using an observation from the model. Connect the observation to the idea you are learning, then try a different case to test your explanation.
Build on what you know. Discover where it leads.
Open the learning mapNew IX-specific course inspected successfully. Biology topics include Cell, Tissues, Reproduction, Diversity. Broad stage competencies on preceding pages are not treated as Grade IX topic placement. Inspected scope: curriculum.
Current body inspected for particle identities, atomic/mass number, first-18 electron distributions and isotopes. Ion construction is an explicitly identified application of charge accounting; arbitrary allowed nuclei are not claimed stable. No figure or wording copied. SHA-256 b400e01b4d4f045c97c2bfee4508cc1dd1d1f43fa455dc0758e6f21b42d10124.
Mapping scope: Verified current IX objective, original bounded implementation. Scientific references and model assumptions do not imply full chapter coverage or educator acceptance.
The explanations, models and assessments on labs.bodhiclasses are original learning activities. An official reference establishes curriculum context; it does not imply approval of this activity by CBSE or NCERT.
An isotope and an ion are different kinds of change. Build two pieces of evidence: convert neutral carbon-12 into neutral carbon-14, then convert neutral sodium-23 into a sodium-23 ion with charge +1. The two completed constructions are kept as separate mission records.
Begin with carbon-12: 6 protons, 6 neutrons and 6 electrons. Reach carbon-14 while keeping the element carbon and keeping the atom neutral.
Original particle-count construction for the first 18 elements, with a simple K/L/M filling pattern of 2, 8, 8. Circular shells represent energy levels rather than literal electron paths. The arbitrary combinations permitted by the controls need not be stable nuclei or naturally occurring ions; the lab makes no radioactivity or binding-energy prediction. Mass number counts nucleons and is not the same as a sample’s average atomic mass. Keyboard +/− buttons perform every action available by dragging. No animation is required.
