periodic table
Across
- 1. the vertical columns on the table. These define a "family" of elements that have similar chemical properties.
- 3. the man who developed the concept of atomic number.
- 4. he reported the discovery of a new gaseous element ARGON This element is chemically inert and did not fit any of the known periodic groups.
- 8. english chemist who presented another way of classifying and organizing the elements.
- 9. gasses a group of elements that has full octet electrons
- 10. positively charged ion
- 14. elements could be classified into sets of three
- 16. german chemist who observed that several elements could be classified into sets of three which is called Triad
- 17. An element in the periodic table that is represented by the letter H.
- 19. An element in the periodic table that is represented by the letter B.
- 20. negatively charged ion
Down
- 2. An element in the periodic table that is represented by the letter O.
- 5. Process by which electrically neutral atoms or molecules are converted to electrically charged atoms or molecules (ions) through gaining or losing electrons.
- 6. A subatomic particle whose electric charge is negative one elementary charge.
- 7. the horizontal rows on the table, with the elements arranged in order of increasing atomic number.
- 11. An element in the periodic table that is represented by the letter S.
- 12. mass the average mass of the atoms of an element measured in atomic mass unit
- 13. table list of all known elements arranged in order of increasing atomic number in horizontal rows and elements which are chemically alike fall directly under one another
- 15. An element in the periodic table that is represented by the letter C.
- 18. An element in the periodic table that is represented by the letter K.