Period Table Flashcards
Vertical Columns
Groups or Families
18 left to right
1 & 2, 3A-8A
Horizontal Rows
7 Periods
Group IA
Alkali Metals
Left Column Lithium down
(except Hydrogen Gas)
Group IIA
Alkaline Earth Metals
Column 2
Starting with Be Berillium
Group IIIB - IIB
3B-2B
Transition Metals
VII A
Group 7A
Halogens
Starting with F (Flourine)
VIII A
GROUP 8A
Noble Gases, Rare Gases, Inert Gases
He (Helium) down
Alkaline Earth Metal in period 5 2nd Column
Strontium Sr
Nobel Gas in period 6, 6th. Row last column
Radon - radio active Nobel gas
(colorless & odorless)
Diatomic Molecules
7 elements that come in pairs
H N O F Cl Br I
A species that is charged when electrons are gained or lost
Ions
Positively charged ion
Cation
Negatively charged ion
Anion
2 or more atoms joined together by a chemical bond
Molecule
2 or more atoms joined together by a chemical bond
Diatomic molecules
All elements in group 1 will loose an electron to become more stable, this gives it a charge of
1+
Groups 1,2,&3 that form positive ions
Metals
Groups 5,6,&7
Non-Metals
Groups 1,2,&3 try to group with
5,6,&7
If sodium looses an electron it becomes?
Neon (very stable element)
Group 8 is very
Unreactive, all elements want to behave like group 8
Metalloid Staircase
Semi-Metals
Metals on left
Non Metals on right
Neutrons =
Mass # - Atomic #
Molecular Fórmula
Shows exact number of atoms of each element H2O2 N2H4
Empirical Formula
Shows which elements are present and the simplest whole number ratio of their atoms
The # of Protons in the Nucleus
Atomic #
Atomic Mass
Protons + Electrons
Neutrons =
Atomic Mass - Atomic number
