GLOSSORY TERMS CHAPTER 5

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FrozenFlame117
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GLOSSORY TERMS CHAPTER 5
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2012-12-02 13:43:22
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  1. What are Atoms?
    An atom is the smallest particle of an element that retains the identity of the element.
  2. What are Electrons?
    An electron is a negatively charged particle within the atom.
  3. What are Subatomic Particiles?
    A subatomic particle is a particle that is smaller than the atom.
  4. What is the nucleus?
    The Nucleus is the positively charged center of an atom. 
  5. What are Protons?
    Aproton is a positively charged particle that is part of every atomicnucleus. 
  6. What are Neutrons?
    A Neutron is an uncharged particle that is part of almost every atomic nucleus.
  7. What are Energy Levels?
    An  Energy level is a possible level of energy anelectron can have in an atom.
  8. What is a Atomic Number?
    An atomic number is the number of protons in the nucleus of an atom.
  9. What is a Mass Number?
    The Mass Number is the sum of the number of protons and the number of neutrons in the nucleus of the atom.
  10. What are isotopes?
    An isotope is one of two forms of an element that have the same number of protons but a different number of neutrons.
  11. What are Bohr-Rutherford Diagrams?
    A Bohr Rutherford diagram is a model of the atom in which a central positive nucleus is surrounded by electrons in energy levels.
  12. What is a Atomic Mass?
    An Atomic Mass is the average mass of the naturally occurring isotopes of an element.
  13. What is the periodic table?
    A periodic table is a system is a system for organizing the elements into columns and rows so that elements with the similar properties are in the same column.
  14. What is a metal?
    A Metal is typically an element that is hard, shiny, malleable and ductile and is a good conductor of heat and electricity.
  15. What is a non-metal?
    A non-metal is typically an element that is not shiny, malleable, or ductile and is a poor conductor of heat and electricity.
  16. What are Metalloids?
    A Metalloid is an element that shares some properties with metals and some properties with non-metals.
  17. What is a period?
    A period is a horizontal row of elements in the periodic table.
  18. What is a group?
    A group is a vertical column of elements in the periodic table.
  19. What is a Halogens?
    Halogens are located in group 17 on the periodic table. They are non-metals that are highly reactive and extremly corrosive.
  20. What is a Alkaline earth metal?
    These are located in the scond group in the periodic table and are highly reactiveless so with Alkali Metals and if heated will burn in air. They are usssuly used as fire works.
  21. What are Alkali Matals?
    These matals are located in the first group in the periodic table. They havelow melting points and are easy to cut with a knife.They are highley reactive and are ussuly kept in oil to keep away from oxygen an water.
  22. What are Noble Gasses?
    Noble Gases located in group 18 are colourless and ouserless at room tempature and are non reactive.
  23. What are Valence Electrons?

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