The History and Arrangement of the Periodic Table Answers

Magnesium (Mg):

Neon (Ne):

Nickel (Ni):

Fluorine (F):

rhenium: ⇒ Re

⇒ phosphorus: atomic number 15

Arranged elements by atomic number: LavoisierDobereinerNewlandsMendeleev✔ Moseley

Organized elements according to increasing atomic mass: X LavoisierDobereiner✔ MendeleevMoseley

Ca:

Cs:

alkali metal: ✔ potassiumX strontiumchlorine

vanadium (V):

⇒ arsenic: As

⇒ rhodium: atomic number 45

nonreactive: hydrogen✔ argonaluminum

xenon (Xe):

⇒ potassium: K

iodine (I):

tin: ⇒ Sn

yttrium: ⇒ Y