Properties of Matter and The Periodic Table

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Across
  1. 5. This is when electrons in the electron cloud have different amounts of energy
  2. 6. Particles in the nucleus with an electric charge of 1+
  3. 8. The smallest particle of an element that retains the elements properties
  4. 9. The horizontal rows of elements in the periodic table; and are numbered 1-7
  5. 11. Arranged the elements on the periodic table in rows based on increasing atomic mass, and in columns based on elements that share similar physical and chemical properties
  6. 12. The small, positively charged center of the atom
  7. 13. Group 1 on the periodic table
  8. 14. Particles with an electric charge of 1-
  9. 16. The elements that make up the "stairsteps" on the periodic table
  10. 17. The vertical columns in the periodic table; they are numbered 1-18; are also called families
  11. 18. Group 2 on the periodic table
Down
  1. 1. This is equal to the number of electrons in a neutral atom
  2. 2. The electrons in an elements outermost energy level; determines the chemical properties of each individual element
  3. 3. Protons and neutrons are composed of smaller particles called these
  4. 4. The electrically neutral particles in the nucleus; they do not have a charge
  5. 6. Where the elements are arranged by increasing atomic number, not atomic mass, and by periodic changes in physical and chemical properties
  6. 7. Group 18 on the periodic table
  7. 10. Uses the chemical symbol of an element surrounded by dots to represent the number of electrons in the outer most energy level
  8. 14. The area around the nucleus of an atom where electrons are most likely to be found
  9. 15. Group 17 on the periodic table