Crossword

2. The horizontal rows of the periodic table are called ______
5. tests are used to identify the presence of a relatively small number of metal ions in a compound.
6. an element that has properties that are intermediate between those of metals and nonmetals.
7. 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
9. Father of periodic table
10. grouped the elements based on their properties into gases, non-metals, metals and earths
12. number, also called atomic mass number or nucleon number,
15. gas, another term for noble gas
17. refers to the tendency of atoms to prefer to have eight electrons in the valence shell
19. Last name of the father of periodic table
20. table, Lesson of Labster 5

1. element with the lowest electronegativity value
3. as the tendency of an atom participating in a covalent bond to attract the bonding electrons
4. invented the law of octave
8. electron, is an electron in the outer shell associated with an atom
11. a column in the periodic table of the chemical elements
13. Newlands invented the Law of _________
14. number, the number of a chemical element in the periodic system
16. placed in order on the periodic table based on their atomic number
18. Periodic ________ of elements