Download History of the Atomic Theory

History of the Atomic Theory QR Code Quest
QR Code 1 – Atomic Basics
1. How have scientists gained their understanding of the atom?
2. The center of the atom is called the ________________.
3. This is made of smaller subatomic particles called _______________ and
_____________________.
Complete the Chart
Particle Name
Charge
Location
4. Overall the nucleus has a ____________ charge.
5. What holds the atom together?
6. Each type of atom is identified by the number of ____________ it has.
QR Code 2 – Greek Concept of atomos
1. When did Leucippus originate the atom concept?
2. Who was his pupil that refined and extended his ideas?
3. Point # 1 – Atom comes from the Greek word ______________ meaning
_______________
QR Code 3 – John Dalton's Atomic Theory
1. Matter is made of ___________, which are ________________ and
____________
2. The atoms of an ______________ are identical in mass and properties.
3. ______________ are formed by combining two or more different kinds of atoms.
4. ______________ ____________ are a rearrangement of atoms.
QR Code 4 – JJ Thompson and the Electron
1. In what year did JJ Thompson make his discovery?
2. How did it change Dalton's first part of the atomic theory?
3. In his experiments, JJ Thompson used a ____________ ________ ________
4. What was Thompson's model of the atom? Consider the atom as a ___________
with ______________ charged particles surrounded by negatively charged
__________________.
QR Code 5 – Ernest Rutherford's Golden discovery
1. In what year did Rutherford propose his atomic model?
2. His model had a dense, positively charged core called a ____________, which
nearly all the ___________ is concentrated.
3. In Rutherford's gold foil experiment, most of the alpha particles passed through
the gold foil, which implied that atoms are composed of large amounts of
___________ _____________
QR Code 6 – Niels Bohr atomic model
1. When was the Bohr model proposed?
2. The Bohr model is a _____________ model in which negatively charged
___________ orbit a positively charged __________ similar to ____________
orbiting the ________.
3. Electrons go around the nucleus in __________ that have a set __________ and
____________.
4. ________________ is absorbed or emitted when electrons move between
___________, also called energy levels.
QR Code 7 – James Chadwick's discovery of the third subatomic paritcle
1. Chadwick proved the existence of the _____________
2. _______________ _____________ is determined by the number of
_____________ in an atom.
3. What year did he make his discovery?
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