2. Who/When/Why
Dmitri Mendeleev came up with the idea
In 1869
He came up with it to organize elements and provide physical
and chemical properties
3. How is the table organized?
It is organized by the increasing of atomic number
They are also grouped together based on their chemical and
physical properties.
4. Rows of Elements
We call the horizontal rows of elements periods.
And the vertical rows groups.
5. Oxygen
Atomic Number: 8
Element Symbol: O
Atomic Mass: 15.9994
Examples: Air
Additional Info: We wouldn't be able to live without i
