chemistry / Atomic & Molecular / free
Atomic Structure
Arrange the parts of an atom and see what defines an element.
Follow the cause1 / 3
Protons set nuclear identity. The atomic number counts protons, and changing that count creates a different element.
atom buildercarbon · neutral atom
Focus the idea
element identitycarbon · 6 p⁺
charge0
mass number12
Try an example
The element is carbon because it has 6 protons.
Changing protons changes the element. Changing electrons changes charge; changing neutrons changes the isotope without changing the element.
04 / PRACTICE
0 / 3 checkedMake the chemistry yours.
Answer from the model, then use the explanation to connect the particle picture to the chemical rule.
CHECK 1 / 3