Chem (6).txt

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Author:
xiongav
ID:
102719
Filename:
Chem (6).txt
Updated:
2011-09-19 01:08:24
Tags:
chem
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Description:
element.illustration & proton,neutron,elec. info.
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  1. What does the atoms nucleus contain?
    Protons = + charge

    Neutron = no charge
  2. What is the electron's charge?
    Negative
  3. What is the nature of electrical charges for pro. neu. and elec?
    Opposite charges attract each other

    Like charges repel each other

    Opposite charges cancel each other so that when a protin and an electron, when paired, are charge-neutral
  4. Protons and electrons must have the same what to be charge-neutral?
    # of protons must equal the # of electrons
  5. Illustration of an element, Be
    • 4
    • Be
    • 9.01
    • Beryllium

    • 4=atomic # (Z)
    • Be= chem. Symbol
    • 9.01=atomic mass
    • Beryllium=name
  6. What is an element defined by?
    Its # of PROTONS
  7. Define the ion formula.
    Ion charge = # of protons - # of electrons
  8. T sor F. The # of protons has the same # of electrons.
    True.

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