Ancient Scientists
Who first proposed matter was made of atoms?
Democritus
Who discovered the neutron, in 1932?
Chadwick
When an ion has formed, what happened to the atom?
It gained or lost electrons.
What particle does the atomic number represent?
Number of protons
Which part of the electromagnetic spectrum has the least energy?
Radio waves
Who stated that matter is continuous, and called it "hyle"?
Aristotle
Who experimented with emission spectra and found out how far the energy levels are from the nucleus?
Bohr
Which particle does an isotope have more (or less) of than the most common form of that element?
Neutrons
What does the Atomic Mass represent - in terms of subatomic particles?
Number of protons plus neutrons.
Which part of the electromagnetic spectrum has the most energy?
Gamma Rays
Who discovered the electron by bending a stream of electricity with a magnet?
Thomson
Explain Heisenberg's Uncertainty Principle.
You can't measure both the position and velocity of an electron at the same time.
How many neutrons does Mercury-201 have?
121 neutrons
How many electrons can fit in an orbital (Schrodinger's orbitals)?
2
Which part (color) of the visible light spectrum has the least energy?
Red
Who discovered the nucleus with the Gold Foil Experiment?
Rutherford
Who explained atomic fission to scientists that first achieved it?
Meitner
What is the charge of the ion of phosphorus?
3-
What are the three subatomic particles? Where do they live? What are their charges?
Proton, nucleus, 1+
Neutron, neutral, 0
Electron, energy levels/orbitals, 1-
Which part (color) of the visible light spectrum has the most energy?
Purple
What were the four points of Dalton's Atomic theory?
- Matter is made of indivisible, indestructible atoms
- Atoms of the same element are identical, atoms of different elements differ in size and mass
- Atoms combine in whole number ratios to for compounds
- Chemical reactions are a rearrangement of the atoms in compounds.
Explain de Broglie's Wave-Particle Duality of Nature.
Electrons can exhibit both wave and particle properties.
Draw the Bohr Model of the ion of Aluminum-28
P = 13, N = 15, E = 10
How many energy levels does a phosphorus atom have? How many orbitals does it have?
3 energy levels, 8 orbitals
How is an emission spectra produced from atoms?
When electrons fall from an excited state orbital to a ground state orbital, they release energy as light that we see in the emission spectra.