the periodic table of elements Flashcards
Chapter 6 in text book (16 cards)
periodic table of elements
chart of all known earths known elements
Columns
groups/families
rows
Periods
Periodic Law
Physical and chemical properties of the elements are periodic functions of their atomic #’s
compound
joining of 2+ elements
Electron
negatively charged particles
Proton
positively charged particles
energy levels capacity
2, 8, 18, 32
amu
atomic mass unit
what nucleus is made of
protons and neutrons
neutrons
particle with no electric charge
atomic number
of protons and electrons
opposites attract
electro magnetic
democritus
2000+ years ago, atom is the smallest piece of matter, always moving
Dalton
elements are composed of atoms, early 1800’s, compounds
JJ Thomson
18