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PS 02 Atomic Theory

8th Grade 2022

QuestionAnswer
Scientist stated that all matter is made of atoms that cannot be created or destroyed. All atoms for an element are identical. Dalton
Nickname for Dalton's Model Billiard Ball Model
Dalton proposed the earliest scientific model of an _______ Atom
Scientist stated that atoms are positive spheres with negative electrons embedded throughout it. Thomson
An atom's electrons move around the nucleus in different orbits, closer or further away according to their energy. Bohr
The modern model of an atom. It describes that electrons move as a particle and a wave, not keeping neat orbits like Bohr's theory. Electron Cloud
Nickname for Bohr's model of an atom. Planetary model
Describe the charges for the 3 subatomic particles of atoms. Protons = Positive, Electrons = Negative, Neutrons = Neutral (No Charge)
Describe the location for the 3 subatomic particles of atoms. Protons = Inside the nucleus, Electrons = Outside the nucleus, Neutrons = Inside the nucleus (Keeps protons stable)
Describe the mass for the 3 subatomic particles of atoms. Protons = 1 AMU, Electrons = 1/1800th AMU, Neutrons = 1 AMU
Nickname for Thomson's model of an atom. Plum pudding model
Atoms have a dense positive core made of protons called the nucleus. The electrons are separate and far to the outside of the nucleus. Rutherford
Nickname for Rutherford's model of an atom. Nuclear Model
Discovered that the nucleus of an atom contains another particle that is uncharged. He gave it the name "neutron". Chadwick
Describe how to count the 3 subatomic particles of atoms. Neutrons = Atomic Mass - Atomic Number
Protons and neutrons are made of smaller particles called ___. Quarks
Atoms that gain or lose electrons, giving the atom a charge. (+ if you lose electrons, - if you gain electrons) Ions
Atoms that have more or less neutrons compared to atoms of the same element. (Changes the mass of the atom only) Isotopes
Created by: Mr. Dornfeld
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