the periodic table of elements Flashcards
Chapter 6 in text book
1
Q
periodic table of elements
A
chart of all known earths known elements
2
Q
Columns
A
groups/families
3
Q
rows
A
Periods
4
Q
Periodic Law
A
Physical and chemical properties of the elements are periodic functions of their atomic #’s
5
Q
compound
A
joining of 2+ elements
6
Q
Electron
A
negatively charged particles
7
Q
Proton
A
positively charged particles
8
Q
energy levels capacity
A
2, 8, 18, 32
9
Q
amu
A
atomic mass unit
10
Q
what nucleus is made of
A
protons and neutrons
11
Q
neutrons
A
particle with no electric charge
12
Q
atomic number
A
of protons and electrons
13
Q
opposites attract
A
electro magnetic
14
Q
democritus
A
2000+ years ago, atom is the smallest piece of matter, always moving
15
Q
Dalton
A
elements are composed of atoms, early 1800’s, compounds
