Trends on the Periodic Table: Students learn to describe the pattern in atomic number, atomic mass, atomic radius, ionization energy, and electron affinity as they look across a period and down a ...

Physicists have filled in some longtime blank spaces on the periodic table, calculating electron affinities of the lanthanides, a series of 15 elements known as rare earths. Physicists at Michigan ...

Where Mendeleev’s table had blank spaces, he correctly predicted ... Union of Pure and Applied Chemistry. The periodic table serves as a fundamental framework for understanding the properties, trends ...

How to solve the periodic table puzzle in the Laboratory There are two things you’re looking for in the Laboratory to solve the first puzzle and get a hint for the second: the code (a blank ...