Science: Chemistry

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Science: Chemistry
2010-11-02 02:45:37
Atoms Ions Reactions

More on atoms, but more complex
Show Answers:

  1. What is the difference between metal and non-metal reactions?
    Metals react by losing valence electrons to become stable, where as non-metals react by gaining electrons to become stable.
  2. Why do some elements react in similar ways?
    Some elements react in similar ways because their subatomic make up is similar. E.g. Fluorine and Chlorine have 7 valence electrons, so they create similar reactions.
  3. Why do metals often react with non-metals?
    Metals and non-metals often react because metals are wanting to lose valence electrons and non-metals are wanting to gain them.
  4. What are the most reactive groups on the periodic table and why?
    Groups 1 and 17 are most reactive because they only need to lose or gain one valence electron, so they will react with anything in order for them to become stable.
  5. What is an isotope?
    An isotope is an atom with the same atomic number but a different number of neutrons.
  6. What causes radiation?
    The degrading of neutrons in isotopes cause radiation.
  7. What is fission and who discovered it?
    Fission is the splitting of an isotope, it creates heat. Erico Fermi was the first person to discover it.
  8. What is an ion?
    An ion is a charged atom. The atom has gained or lost a valence electron. Ions have a different number of electrons to their number of protons. This means that the ions are electrically attractive.
  9. How does an atom become an ion?
    An atom becomes an ion when an atom gains or loses valence electrons to become stable.
  10. What is an anion?
    An anion is a negatively charged ion. It has more electrons than protons. Non-metals form cations as they gain electrons to become stable.
  11. What is a cation?
    A cation is a positively charged ion as it has more protons than electrons. Metals form cations.
  12. What are the six properties of metal and what do each mean?
    The six properties are: luster (shine), good conductors of heat and energy, high density (heavy), high melting point, ductile (able to be drawn out into thin wires) and malleable (changing form).
  13. What does corrosion mean?
    Corrosion or to corrode means to gradually wear away.
  14. What is a metalloid?
    A metalloid is a mixture of a metal and non-metal. A metalloid has similar properties to a metal, though they don't conduct heat and energy as well as metals. Examples are: Boron, Silicone and Arsenic.