Atomic Basics
Smallest unit of matter
What is an atom
Positively charged particle
What is a proton?
Greek philosopher who came up with “atom”
Who is Democritus?
Thomson’s model’s nickname
What is the plum pudding model?
An atom is mostly made of this
What is empty space?
The center of an atom
What is the Nucleus?
Negatively charged particle
What is an electron?
Scientist who proposed solid sphere model
Who is John Dalton?
Dalton’s model looked like this
What is a solid sphere?
Atom with one proton
What is hydrogen?
Atoms of the same element with a different number of neutrons
What is an isotope
What is a neutron?
Scientist proposed the “Plum Pudding” model of an atom
Who is J.J. Thompson?
Rutherford’s model introduced this key feature
What is the nucleus?
What is the relative atomic mass of Gold?
What is 197.0?
An atom that has gained or lost electrons
What is an ion
Region where electrons are mostly found
What is the electron Orbit or cloud?
Scientist who claimed central charge was in tiny nucleus
Who is Ernst Rutherford?
Bohr’s model showed electrons moving in these paths.
What are electron orbitals/ energy levels?
A substance that has mass and volume
What is Matter?
The number of protons in an atom
Total number of protons and neutrons in an atom
What is the Atomic mass number?
Introduced that electrons orbit nucleus like planets
Who is Neils Bohr?
Current model where electrons are in clouds
What is the quantum model?
What is God’s Intelligence/ Design?