Atomic Theory
Philosopher who lived in the 4th century B.C. who suggested that matter is made up of tiny particles called atoms
Who is Democritus?
Discovered the electron using a cathode ray experiment
Who is J.J. Thomson
What is the name of the scientist who worked with the hydrogen atom to develop a model of the atom where the electrons exist in energy levels?
Who is Niels Bohr?
The periodic table is organized in terms of this which also tells the number of protons in the nucleus of an atom
What is the atomic number
The part of the wave that is also known as the low point of the wave
What is the trough?
The English school teacher who proposed a theory of atoms that we still use today
Who is John Dalton
The name of the experiment that lead to the the computation of the exact charge and mass of the electron
What is the oil drop experiment
The name of the packet of energy required for an atom to change energy levels
What is a quantum (a) of energy?
This term describes the number of protons and neutrons in the nucleus of an atom
What is the mass number
The term that talks about the the number of waves that occur per unit time represent by the Greek letter nu, v
What is the frequency?
The way Dalton described an atom.
What is a tiny indivisible sphere
The scientist who is responsible for the gold foil experiment that lead to the understanding that an atom is mostly empty space
The names of the low energy state of an electron and the high energy state of the electron respectively?
What are ground state and excited state?
Isotopes are atoms of the same element that differ in number of these subatomic particles
What are neutrons
The name of the pattern of light given off by an element that is unique to each element like a finger print
What is the emission spectra?
The Law that is the result of the statement that when chemical reactions occur, atoms are separated, joined or rearranged by a chemical reaction
What is the Law of Conservation of Atoms
Which scientist conducted the canal ray experiment that lead to the discovery of the proton
Who is Eugene Goldstein?
Ultraviolet, Infrared, X Rays, Microwaves
This is the lowest energy form of electromagenetic radiation of the choices listed above
What is Microwaves
The name of the isotope of carbon that has 8 neutrons in the nucleus of its atom.
What is carbon-14?
The name of the scientist who worked with black body radiation (heating metals to see color changes) that supported the idea that electrons require packets of energy to change energy levels
Who is Max Planck?
The Law that states that it is possible for atoms of the elements to combine in whole number ratios to form compounds with different properties
What is the Law of Multiple Proportions
What scientist discovered the neutron by bombarding beryllium with alpha particles?
Who is James Chadwick?
If an electron drops form energy level 6 (n=6) to energy level 2 (n=2). Which of the following is most likely the color of light that will be emitted?
Green, yellow, violet or orange
What is violet
The specialized names given to the 3 isotopes of hydrogen.
What are protium, deuterium, and tritium?
The element copper has naturally occurring isotopes with mass numbers of 63 and 65.
The relative abundance and atomic masses are 69.2% for a mass of 62.93 amu and 30.8% for a mass of 64.93 amu. Calculate the average atomic mass of copper.
What is 63.5 amu?