What is the difference between Bohr's theory and the wave theory?
In the Bohr theory, electrons are designated to specific orbitals. In the wave theory, they are placed in a wave.
100
What are the subatomic particles in the nucleus? *candy*
What are the protons and neutrons.
100
How many grams is in one mole of phosphorus?
What is 31 grams.
100
What is nuclear fission?
What is splitting a heavy nucleus into two nuclei with smaller mass numbers.
100
What are nucleons?
The collective term for protons and neutrons in the nucleus.
200
Who decided that atoms are indestructable and unchangeable? (Law of Conservation of mass) *candy*
Who is Dalton?
200
How many electrons are in Pb (-4 )?
What are 86 electrons.
200
How many moles is in 11.32 atoms of Bromine?
What is 1.93 x 10^-10
200
The half life of polonium-210 is 138.4 days. How many mg of polonium-210 remain after 415.2 days if you start with 2 mg of the isotope? *candy*
What is .25 mg.
200
What is an isotope?
What is atoms of the same element, but have different number of neutrons, thus, a different mass number.
300
Name the scientists who believed that the atom was indivisible.
Who is Democritus and Dalton.
300
What is the proton and neutron number of Carbon-14?
What is 6 (proton) and 8 (neutron)?
300
How many moles is 12 grams of chlorine?
What is .34 moles
300
What kind of decay emits an electron?
What is beta decay.
300
What is the average atomic mass? How do you find it? *candy*
What is average mass of all different isotopes of the same element. Find it by multiplying the mass by the relative abundance of each isotope, and adding the masses.
400
What did we learn from the cathode ray experiment? *candy*
That atoms can be divided into smaller particles, defined the properties of electrons.
400
What two numbers change when comparing isotopes?
What is the neutron number and mass number?
400
How many molecules is 8.2 grams of sodium? *candy*
What is 2.09 x 10^10
400
What subatomic particle is low in energy and is not penetrating? *candy*
What is an alpha particle.
400
What is the other name for "the mole"?
What is Avagadro's number.
500
Which scientists did the cathode ray tube experiment and the gold foil experiment?
Who is Thomson and Rutherford.
500
Electrons with the lowest energy are in what location, related to the nucleus? *candy*
What is closest to the nucleus.
500
What is the average atomic mass for the following:
Flourine-32 .9705%
Flourine-33 .0167%
Flourine-35 .0128%
What is 32.0551 g
500
What element is emitted in alpha decay? *candy*
What is helium.
500
What element (specify) do we use as a standard to relate all atomic masses to? *candy*