Science/Strand IV/Content Standard 1/High School/Benchmark 3
Benchmark Question: What makes up the world around us?
Focus Question: How do the atoms in one element
differ from those in another element?
After a classroom discussion
about atomic numbers and mass numbers and their relationship to subatomic
particles, the teacher will guide students in creating a model of an
element. The teacher will use students as protons, neutrons, and electrons.
“Neutrons,” labeled with
zeros, sit on the floor in the middle of the room. “Protons,” labeled with
a positive symbol, stand among the neutrons in the middle of the room.
“Electrons,” labeled with a negative symbol, walk in a random pattern around
the nucleus (protons and neutrons).
Students will relate the
number of protons to the number of electrons in a neutral atom and will
explain how the elements differ (different numbers of protons).
After the modeling, students
will write a summary of atomic numbers and mass numbers and their
relationship to subatomic particles.
Extension: The teacher can name an element,
then students can use a periodic table to find relevant information and can
assume their roles in the atom.