The sum of protons and neutrons is the
What is the electron configuration for He
Scientist whose alpha particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge.
When an electron jumps from n=5 to n=2 what color light is emitted?
How many electrons can be in a 4f sublevel
The number of protons indicates the identity of the element and the
What is the Noble Gas configuration of Fe
When Thorium-234 goes through alpha decay what is produced?
Atom that has gained or lost electrons
The type of radiation that is most penetrating
Atom with the same number of protons but different number of neutrons
Proposed the Law of Conservation of Matter.
The identity of an element depends on its
When a gamma ray is given off during radioactive decay as a
When Thorium-234 goes through beta decay and gamma decay what is produced?
Explain the difference between C-14 and C-12?
The radioactive particle with the most mass.
Electrons located in the outermost energy level
Ions of an element contain a different number of
Identified the charge on the electron using the Oil Drop Experiment
The first scientist to show that atoms emit negative particles using his cathode ray experiment.
What are the three subatomic particles?
First to use the term atom.
How many electrons are in the outermost energy level of an electrically neutral atom of nitrogen
High energy photon
