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30 Cards in this Set
- Front
- Back
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C
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Carbon
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H
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Hydrogen
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O
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Oxygen
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P
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Phosphorous
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K
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Potassium
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I
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Iodine
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N
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Nitrogen
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S
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Sulfur
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Ca
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Calcium
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Fe
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Iron
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Mg
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Magnesium
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Na
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Sodium
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Cl
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Chlorine
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Another name for a row
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Period
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What does the period tell you?
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The number of energy levels in the atom
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How many energy levels are possible?
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7
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__ electrons fill the first level.
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2
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__ electrons fill the second.
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8
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Valence electrons
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Electrons in the atom's outer-most energy level
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Family = Group = ____
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Column
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What does the family number tell you?
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The number of valence electrons in the atom.
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The 6 most important elements in Biology
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C H N O P S
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Where on the periodic table are the most important elements in Biology found?
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The first 3 rows
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Atomic Number = Number of ______
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Protons
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The atomic mass rounded off to a whole number is called the ________.
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Mass number
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What is the mass of a proton?
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1 amu (atomic mass unit)
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What is the mass of a neutron?
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1 amu (atomic mass unit)
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What is the mass of an electron?
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Virtually mass-less
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Number of Neutrons = Mass number - ______
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Atomic Number (Number of Protons)
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An atom is the smallest particle of an ______.
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Element
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