History of Periodic Table
The man who gets the credit for the Periodic Table; he was a Russian chemistry teacher
Mendeleev
Why do atom's get larger down a group?
more electron levels/shells/orbitals
What is the name of element number 15 and atomic number?
Phosphorus, 15
What is the name of the group 1, most reactive metals periodic table of elements?
Alkali Metals
What does the term "valence" mean?
Outermost
What were the original four elements of Ancient Times?
Earth, Air, Fire and Water
Why do atoms get smaller as you go across a period?
Nuclear pull
What is the name of the element has an atomic number of 79?
Gold
Which group of elements play an important role in living organisms, and are also extremely valuable as strong, structural useful materials AND make up the middle portion on the periodic table?
Transitional Metals
2-4, key element for organic chemistry
carbon, C
How is the periodic table arranged today?
By atomic number.
Electronegativity is the ability to...
attract electrons
What is the name of the element with the elemental symbol Zn?
Zinc
The elements boron (B), silicon(Si), Germanium (Ge) Arsenic, Antimony, Tellurium
Metalloids/Semi-metals
What is the electron configuration of Neon?
2-8
The Periodic Table is called Periodic because...
it has many predictable repeatable pattern
Which group has no electronegativity?
group 18, Noble Gases, Inert Gases
Which element has 27 as its atomic number?
Co, cobalt
What the Group 17 nonmetals are called?
Halogens
Which group has 6 valence electrons?
Group 16
How did Lavoisier (and scientists still today)define elements?
cannot be broken down
Metals are found on the ________ side of the Periodic Table.
left
What is the number of neutrons in copper-65?
36
What are the Group 18 elements called?
Noble or inert gases
What does the electron configuration for the element at period 5 group 6?
Mo, 2-8-18-13-1