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Studying Atoms
Subatomic Particles
Atomic & Mass Numbers
Modern Atomic Theory
Assorted Atomic Answers
100
That's where Democritus got the name "atom".
What is from the Greek "atomos" meaning "uncut" or "indivisible?
100
Positive charge
What is a proton?
100
Atomic number
What is # of protons in an atom of an element?
100
Bohr's model looked like this.
What is a solar system?
100
Arrangement of electrons in the orbitals of an atom.
What is electron configuration?
200
It's the theory Dalton proposed.
What is all matter is made up of individual particles called atoms which cannot be divided?
200
Negative charge
What is an electron?
200
Mass number
What is sum of protons and neutrons in the nucleus of an atom?
200
Possible energies electrons can have.
What are energy levels?
200
The most stable electron configuration
What is all electrons are in orbitals with lowest possible energies?
300
Thomson's experiments provided this evidence.
What is that atoms are made of even smaller particles?
300
No charge
What is a neutron?
300
Different elements have
What is different # of protons (atomic number)?
300
An electron in an atom can move from one energy level to another when....
What is the atom gains or loses energy?
300
When all electrons in an atom have the lowest possible energies
What is ground state?
400
Why an atom is neutral.
What is because it has neither positive or negative charge (equal number of protons and electrons)?
400
Found in the nucleus.
What are protons and neutrons?
400
These have same atomic number but different mass number.
What are isotopes?
400
Electron Cloud Model
What is visual model for most likely locations for electrons in an atom?
400
Almost all of the mass of an atom is located.....
What is in the nucleus?
500
According to Rutherford's model, this is concentrated in the nucleus.
What is all of an atom's positive charge is concentrated in its nucleus?
500
How protons, electrons, and neutrons are distinguished.
What are mass, charge, and location in the atom?
500
Oxygen-16 has 8 protons, 8 neutrons. Oxygen-17 has......
What is 8 protons and 9 neutrons?
500
Region of space around a nucleus where electrons are likely to be found
What are orbitals?
500
Atoms emit energy as light when
What is electrons move to a lower energy level?