Crossword

3. Periodic ________ of elements
4. electron, is an electron in the outer shell associated with an atom
7. grouped the elements based on their properties into gases, non-metals, metals and earths
11. as the tendency of an atom participating in a covalent bond to attract the bonding electrons
12. a column in the periodic table of the chemical elements
15. refers to the tendency of atoms to prefer to have eight electrons in the valence shell
16. number, the number of a chemical element in the periodic system
18. an element that has properties that are intermediate between those of metals and nonmetals.
19. table, Lesson of Labster 5
20. Newlands invented the Law of _________

1. tests are used to identify the presence of a relatively small number of metal ions in a compound.
2. placed in order on the periodic table based on their atomic number
5. invented the law of octave
6. element with the lowest electronegativity value
8. gas, another term for noble gas
9. Father of periodic table
10. number, also called atomic mass number or nucleon number,
13. gas,any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates
14. The horizontal rows of the periodic table are called ______
17. Last name of the father of periodic table