Development of the Atomic Theory
Atoms
Atoms, Atoms, & more Atoms
Modern Atomic Model
Electrons, Protons, & Neutrons
100
Dalton's atomic theory was accepted because there was ___________ to support it.
What is evidence
100
The word atom comes from a Greek word meaning " unable to be ________"
What is divided
100
Atoms have an equal number of _______ & _______
What is protons and electrons
100
The Modern Atomic Theory says that electrons behave like ________.
What is waves
100
A subatomic particle that has a negative charge
What is electron
200
Thomson made his discovery about atoms while using a
What is cathode rays
200
A region in which there is a high probability of finding an electron is the ________
What is valence electron.
200
An atom gains energy by absorbing a light particle called a
What is photon
200
The Modern Atomic Model of an atom says it is nearly impossible to determine an electron's exact _________.
What is Location
200
The nucleus consists of _______ & ________
What is protons and neutrons
300
Thomson is responsible for discovering that an atom contains
What is electrons
300
An elements atomic number is equal to its number of
What is protons
300
If the atomic mass of Hydrogen is 1 u, 1 mole of pure hydrogen will have a mass of _____ (don't forget your unit)
What is 1 g
300
The four types of orbitals are
What is s,p,d,f
300
Valence electrons determines an atoms _________ properties.
What is chemical
400
Who was the first to determine that atoms could be divided
Who is Thomson
400
An atoms mass number equals the number of ______ + ______
What is protons/neutrons
400
A mole describes the _______ of a substance
What is amount
400
An electron that gains energy enters an ____ ____ and absorbs a particle of light
What is excited state
400
An electron jumps to a new energy level when the atom _____ or ______ energy
What is gains/loses
500
The first person to suggest that matter was made of atoms was
What is Democritus
500
What is the mass number of an element that has 20 protons, 20 electrons, and 21 neutrons
What is 41
500
A carbon atom has a mass number of 12. Its atomic number is 6. How many neutrons does the iron atom have?
What is 6
500
Neons atomic number is 10. That means that a neon atom has ____ protons in it's nucleus.
What is 10
500
Atoms have no electric charge because they have a _______ number of electrons and protons
What is equal
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