Chapter 4 Flashcards
Radiation deflected toward the positively charged plate is called?
Beta Radiation
Atoms with the same number of protons but different numbers of neutrons are called?
Isotopes
High-energy radiation that has no charge and no mass
Gamma Rays
The smallest particle of an element that retains the properties of that element is called?
Atom
The weighted average mass of an element’s isotopes is called?
Atomic Mass
The center-most part of an atom where the protons and neutrons are contained is called the?
Nucleus
Radiation deflected toward toward the negatively charged plate is
Alpha Radiation
The rays and particles emitted by radioactive material is called?
Radiation
Equal to 1/12 the mass of a carbon-12 atom
Atomic Mass Unit
Ray of radiation traveling from the cathode to the anode.
Cathode Ray
Process (not requiring energy) by which unstable nuclei lose energy+
Radioactive Decay
States that all matter is composed of atoms.
Dalton’s Atomic Theory
Process whereby some substances spontaneously emit radiation
Radioactivity
Mass Number
The total number of protons and neutrons in a nucleus.
Atomic Number
The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
