英文關鍵字
atomic
model
periodic
chemistry
chemical
theory
particle
physics
element
atom
molecular
science
proton
neutron
structure
electron
education
nucleus
quantum
scientific
design
laboratory
learning
study
orbital
educational
research
orbit
concept
school
matter
history
chemist
dalton
tomson
rutherford
bohr
shell
alchemy
physical
university
mass
thomson
planetary
technology
basic
timeline
bond
mechanics