Chapter 2

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  1. is the smallest particle that has all the properties of an element
    An atom
  2. what are the The fundamental particles of an atom .
    The fundamental particles of an atom are the electron, the proton, and the neutron.
  3. what type of charge does the PROTON carry
    The proton carries one unit of positive electric charge.
  4. what type of charge does the neutron carry
    The neutron carries no charge; it is electrically neutral.
  5. what determines the chemical element
    The number of protons determines the chemical element
  6. isotopes are
    Atoms that have the same number of protons but differ in the number of neutrons are
  7. what is the electrical charge of an atom
    In their normal state, atoms are electrically neutral; the electric charge on the atom is zero.
  8. If an atom has an extra electron or has had an electron removed, it is said to be
  9. Ionization is.
    the removal or addition of an orbital electron from an atom
  10. how many electrons can an outer shell have
    No outer shell can contain more than eight electrons.
  11. The force that keeps an electron in orbit is the
    centripetal force.
  12. Atoms that have the same atomic number but different atomic mass numbers are .
  13. Atomic nuclei that have the same atomic mass number but different atomic numbers are.
  14. Atoms that have the same number of neutrons but different numbers of protons are .
  15. what has the same atomic number and the same atomic mass number.
  16. Atoms of various elements may combine to form structures called .
  17. The smallest particle of an element is an atom; the smallest particle of a compound is a.
  18. Radioactivity is
    the emission of particles and energy in order to become stable
  19. what  results in emission of alpha particles, beta particles, and usually gamma rays
    Radioactive decay
  20. the time required for a quantity of radioactivity to be reduced to one-half its original value.
    The half-life of a radioisotope
  21. 3.3 half lives =
    1 tenth life
  22. particle is a helium nucleus that contains two protons and two neutrons.
    An alpha
  23. what is an electron emitted from the nucleus of a radioactive atom.
    A beta particle is
  24. X-rays and gamma rays are often called
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Chapter 2
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