Periodic Table Surprise!

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Across
  1. 2. So far, scientists have confirmed the existence of six uniquely different quarks. Scientists theorize that an arrangement of three quarks held together with the strong nuclear force pro-duces a proton. Another arrangement of three quarks produces a neutron.
  2. 4. table the elements are arranged by increasing atomic number and by changes in physical and chemical properties.periodic table, the elements are arranged by increasing atomic number and by changes in physical and chemical properties.
  3. 5. are particles with an electrical charge of 1.
  4. 6. that is surrounded by a cloud containing electrons
  5. 11. cloud is the area around the nucleus of an atom where its electrons are most likely found.
  6. 12. smallest piece of matter that still retains the property of the element
Down
  1. 1. Atoms of the same element that have different numbers of neutrons
  2. 3. are neutral particles that do not have an electrical charge.
  3. 7. element 47 and its symbol is Ag
  4. 8. are particles with an electrical charge of 1.
  5. 9. number The number of protons in an atom is equal to a number
  6. 10. element 79 and its symbol is Au.