Origins
Why was The Periodic Table created?
To arange and organize the elements.
What are groups?
They are now elements are arranged horizontally.
How many groups are there?
18
Which ones are dull, brittle and poor conductors
Non-metals
Are non-metals located on the right or left side of the metalloids?
The right
Do we still use the same organization and setup as the first periodic table?
No, his table was the framework and basics for later adjustments to the modern periodic table.
What are periods?
The horizontal rows of elements and are organized by the number of electron shells/rings.
What is group 3-12?
Transition Metals
What elements are on the staircase?
Metalloids
What does a Bohr model represent.
The Bohr model represents the particle nature of electrons.
Who created the first Periodic Table?
Dmitri Mendeleev made the first ever periodic table.
Where are metalloids located?
The stair step.
Which group is akline earth metals?
group 2
Metals
What is group 2?
Alkaline earth metals
When was it made?
1816
What are most living things made of?
Nonmetals.
What group is group 13?
Boron group
Which ones are shiny, brittle, and sometimes conductors.
Metalloid
How do you determine properties of an element?
The properties of an element are determined by its outermost electrons or those in the highest energy orbital.
How many elements did the first periodic table include?
63
Why is group 18 the least reactive group?
Group 18 already completed their octet so they don’t generally gain or lose electrons.
What groups are the most reactive and why?
1 and 17, because they both need 1 more valence eletrons.
How many of the 118 elements are metals?
91
What does a Bohr modle show?
A bohr model shows a nucleus of an atom with the negatively charged electrons of the atom orbiting the center.