Distinguish between an atom and an element. · Distinguish between atomic number, mass number, and atomic mass.

Distinguish between an atom and an element.
· Distinguish between atomic number, mass number, and atomic mass.
· What happens to the properties of elements across any period of the periodic table?
· What causes an atom to emit light?
· What was Planck’s quantum hypothesis?
· What does “radioactive” mean?
· Describe the three types of radioactive radiation: alpha, beta, and gamma.
· Why doesn’t the repulsive electric force of protons in the atomic nucleus cause the protons to fly apart?
· What is meant by the half-life of a radioactive sample?
· Why is there more carbon-14 in living bones than in once-living ancient bones of the same mass?
· How is a nuclear reactor similar to a conventional fossil-fuel power plant? How is it different?
· Who discovered that energy and mass are two different forms of the same thing?
· What kind of nuclear power is responsible for sunshine?
· How many electrons can occupy the first shell? How many can occupy the second shell?
· How do the electron-dot structures of elements in the same group in the periodic table compare with one another?
· How does an ion differ from an atom?
· Why does the fluorine atom tend to gain only one electron?
· Which elements tend to form ionic bonds?
· Do metals more readily gain or lose electrons?
· Which elements tend to form covalent bonds?