Q2: Lesson 1.4 | Families of Elements Flashcards
Shiny solids; good conductors of heat and electricity
Metals
All found of the right side of the periodic table. It can be solids, liquids, or gases
Nonmetals
Nonmetals that can conduct heat and electricity
Metalloids or semimetals
He organized elements by increasing atomic mass. He also predicted the existence of undiscovered elements
Dmitri Mendeleev
Organized elements by increasing atomic number. He also fixed problems in Mendeleev’s arrangements
Henry Mosely
Electron in the outermost shell
Valence electrons
Properties of elements repeat periodically when the elements are arranged by increasing atomic number
Periodic Law
Energy required to remove an e- from a natural atom
First Ionization Energy
The S orbital can hold up to __ electrons
2
The P orbital can hold up to __ electrons?
6
The D orbital can hold up to __ electrons
10
The F orbital can hold up to __ electrons
14