Scientists
What did John Dalton's Atomic Theory of Matter aim to do?
Attempt to describe all matter in terms of atoms and their properties.
Protons have a _____________ charge and are located in the nucleus of the atom.
Positive
Which atomic model of the atom had no protons, neutrons, or electrons?
John Dalton's atomic model.
How many electron shells does an atom with 12 electrons have?
2 shells
What scientist discovered electrons and what did he originally call them?
Joseph Thomson
Corpuscles
Neutrons have a _______________ charge and are located in the _____________ of an atom.
Neutral (No charge)
Nucleus
Which atomic model was the first to include electron orbits?
Niel Bohr Model
How many electron shells does an atom with 28 electrons have?
3 Shells
What scientist created the "nuclear model" of the atom?
Ernest Rutherford
Electrons have a _________________ charge and are located in the ________________ of an atom.
Negative
Electron Rings / Orbits / Energy Levels
Which atomic model had a positively charged nucleus surrounded by negatively charged electrons?
Ernest Rutherford's Nuclear Model
How many shells / rings would an atom have if an atom has 51 electrons?
5 shells / rings
Which scientist suggested that electrons travel on defined paths or "orbits"?
Niels Bohr
A ______________ is a subatomic particle that has a negative charge and is located in the furthest _________ of an atom.
A valence electron is a subatomic particle that has a negative charge and is located in the furthest ring /shell of an atom.
Why was Thomson's atomic model called the "plum pudding model" or the "raisin bun model"?
Electrons were floating aimlessly in positively charged matter.
How many electron shells does an atom with 43 electrons have?
Does it have any valence electrons? If so, how many?
4 shells
15 Valence Electrons
What are three key features that changed over the course of time from Dalton's original model to the modern day Niel Bohr's model?
Electrons
Nucleus
Electron Orbits (Levels)
How many electrons can fit in the first electron ring of an atom?
How many electrons can fit in the second electron ring of an atom?
How many electrons can fit in the third ring of an atom?
How many electrons can fit in each ring after third ring of an atom?
2
8
18
18
What were the four main points of Dalton's Atomic Theory of Matter?
1. All elements are made of atoms.
2. Atoms from the same element are alike.
3. Two or more elements can bond to form a compound.
4. Atoms cannot be created or destroyed by physical means.
How many electron shells does an atom with 55 electrons have?
Does it have any valence electrons? If so, how many?
5 Shells
9 Valence Electrons