• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

Card Range To Study



Play button


Play button




Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

12 Cards in this Set

  • Front
  • Back
the periodic table is arranged in order of
increasing atomic numbers
the atomic number of an element is
the same as the number of protons
the number of electrons is the same as the number of protons in
a neutral atom
all atoms of an element have
the same number of protons
have little mass and a negative (-) charge

they are located in election clouds or probability clouds outside the nucleus
have a positive (+) charge
have no charge
protons and neutrons are located
in the nucleus of the atom and comprise most of its mass
an atom that has the same number of protons as the other atom of the same element but has a different number of neutrons

some are radioactive but many are not
the length of time required for half of a given sample of a radioactive isotope to decay
using a periodic table one can determine
the atomic number
atomic mass
number of protons
number of electrons
number of neutrons for any neutral atom of an element
formula for half-life if the initial radioactivity is x, the decay constant is k and t is the time
x k^t = 1/2x
k^t = 1/2
t logk = log 1/2
t = - 0.301/logk