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Atomic Structure Crossword Puzzle

Teacher: Dorothy Holley
Across
Number of wave peaks in a unit of time.
Said that "under constant temperature and pressure, volumes or reacting gases and their products are whole numbers"
Color of sodium ion in salts.
Helium nucleus.
Conducted the oil drop experiment.
Person who experimented on the charge to mass ratio of an electron.
Atom with 30 electrons
Quanta of radiant energy.
Atoms of the same element with a different number of electrons.
Wrote the first Atomic Theory based on experimental evidence.
Atomic number of carbon.
Discovered radiation given off by uranium and radium.
Number of protons in oxygen.
Explained that mass and energy are equivalent according to the equation E=MC2(squared).
Particle within the nucleus without a charge.
Earliest contributor to the atomic theory, helped name the atom "Atomos".
Very high energy xrays
Usually has four neutrons.
Symbol "Z".
Isotope of Hydrogen with 1 neutron.
The name of the unit for "1/seconds".
Down
High speed electron emitted from radioactive nuclei.
Introduced the idea that (electromagnetic) energy is radiated in small packets called quanta.
Process by which the nucleus of an unstable atom loses energy .
Discovered the neutron.
Conducted the gold foil experiment to find that most of the atom is empty space but the nucleus is small, heavy, and positively charged.
Wrote "The Law of Definite Proportions"
First understanding of atom based on experimental evidence.
82 protons, 125 neutrons.
Spectra produced by adding energy to an atom and monitoring light wavelengths given off by the atom as it returns to its original energy level.
Color of Potassium ion.
Said that "equal volumes of gases at the same temperature and pressure will have the same number of molecules.
Atoms of the same element with different numbers on neutrons.
Distance between one peak of a wave to the next.
Where the mass of an atom is.
Material Rutherford used to find the nucleus and the empty space of an atom.
Color of copper ion in salts.
A little packet of energy.
Largest isotope of Hydrogen.
Positively charged electrode.
Originated the idea that electrons travel in defined energy levels around the nucleus.
Color of metal ion in salts of strontium.