Q&A for How to Find Atomic Number

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  • Question
    How do I find the atomic mass number?
    shardaja sanders
    Community Answer
    Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
  • Question
    Where are the neutrons and protons on a periodic table?
    Community Answer
    The number of protons in one atom of an element is indicated by the atomic number, printed at the top of an element's box on the periodic table. The number of neutrons is not listed on the periodic table. However, you can calculate the number of neutrons in an atom of an element. First, find the atomic weight, listed in the bottom of the element's box. Round this number to the nearest whole number to obtain the mass number. Finally, subtract the atomic number from the mass number.
  • Question
    What are the protons for gold?
    Community Answer
    The atomic number represents both electrons and protons, so the number of protons for gold is 79.
  • Question
    What do atoms contain?
    Community Answer
    Protons, which are positively-charged particles; neutrons, which are neutral; and electrons, which are negatively-charged.
  • Question
    How do I calculate the atomic weight?
    shardaja sanders
    Community Answer
    To calculate the average atomic weight, each exact atomic weight is multiplied by its percent abundance (expressed as a decimal). Then, add the results together and round off to the appropriate number of significant figures.
  • Question
    How can I find out the atomic mass from the electron configuration of an element?
    Community Answer
    Determine the number of electrons and know that for most atoms, the electron number equals the number of protons (a balanced atom). Most elements have roughly an equal number of protons and neutrons. So, for example, the electron configuration of carbon shows 6 electrons, so 6 protons are likely present as are 6 neutrons, meaning the atomic mass of carbon is around 12.
  • Question
    How do I determine the atomic number of an element?
    Community Answer
    Subtract the number of neutrons from the mass number.
  • Question
    What are atoms?
    Community Answer
    Atoms are the small particles that all matter is made of.
  • Question
    How do I find the number of protons if the neutrons and atomic mass are not given?
    Community Answer
    For any stable atoms, the number of electrons and protons are usually the same.
  • Question
    How do I get protons, neutrons, and electrons only with the atomic number and atomic mass?
    Ruby
    Top Answerer
    The protons and electrons should be the same as the atomic number. The number of neutrons is the number of protons taken away from the atomic mass.
  • Question
    How do I calculate the atomic number when the atomic mass is given?
    I_l1ke_gam3s
    Community Answer
    The neutrons is the atomic mass minus the atomic number. This means the atomic number is the neutrons plus the atomic mass.
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