The Periodic Table
The 18 columns
Groups or Families
Mostly gases at room temperature.
Nonmetals.
The 4 different rooms
S, P, D, F
The 7 Rows
Periods
Mostly solid at room temperature.
Metals.
How we find the number of neutrons.
Mass Number - Atomic number or
BIG - little
How the elements are organized
Atomic # or Number of protons.
Name three properties of metals
Hard, Shiny, Malleable, ductile, conductive.
Draw F919
F919 Means 9+, 9-, 10N
9+ 10N in the center circle.
Check Step. 1S2,2S2,2P5
Name three things an element box tells you.
1. Atomic Number.
2. Mass Number
3. Chemical Name
4. Chemical Symbol
These gases react with nothing else.
Noble Gases.
What is found in the nucleus?
Protons and Neutrons.
Who first set up the periodic table
Dmitri Mendeleev
This gas acts like a member of two different families.
Hydrogen
Draw Kr 36 84
Kr 36 84 mean 36+, 36-, 48N
36+ and 48N in the nucleus.
Check Step: 1s2,2s2,2p6, 3s2, 3p6, 4s2, 3d10, 4p6