anatomy topic 2

  1. atomic number
    amount of protons in an tom
  2. mass number
    amount of protons and neutrons in an atom
  3. list most abundant to least abundant elements in the body
    • Oxygen-65%
    • carbon-18.5
    • hydrogen-9.5
    • nitrogen-3.2
    • calcium-1.5
    • phosphorus-1
    • potassium, sulfur, sodium, chlorine, magnesium - less than 1%
  4. ion
    an atom with a (+) or (-) charge
  5. cation
    positively charged ion, fewer electrons
  6. anion
    negatively charged ion, more electrons
  7. electron shell
    the range the electron may move within. atoms may have up to 5 shells (2,8,8,8,8)
  8. valence shell
    most outer electron shell if its full its more stable, if not it shares electrons
  9. ionic bond
    anions and cations bonding together
  10. human body is made up of what 4 elements
    hydrogen, carbon, oxygen, nitrogen
Card Set
anatomy topic 2
topic 2