Periodicity

2. : organizes all discovered chemical elements in rows and columns according to an increasing atomic number.
4. : repulsion of material from an external magnetic field.
7. : any of the series of 15 metallic elements from lanthanum to lutetium in periodic table.
14. : ion that contains 1 or more ligands that are attached to a central metal cation through a dative covalent bond.
15. : the blocking of valence shell electron attraction by the nucleus.

1. : the basic method in which a compound forms a permanent magnet or is attracted to a magnetic field.
3. : if elements are arranged in an order, the properties of elements would repeat after some period.
5. any of the 6 chemical elements that make up Group 1.
6. : chemical elements that forms a salt wen it reacts with metal.
8. : attraction of material to an external magnetic field.
9. : row of chemical elements in periodic table
10. : column in periodic tale
11. : group 18 of periodic table
12. : measure of ability of protons in the nucleus to attract negative electrons in orbit around the nucleus.
13. : 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.