Dead Scientists
Came up with the theory that atoms are made up of negative particles and then therefore must also have positive particles.
JJ Thomson
Russian scientist that classified and organized known elements into the Periodic Chart
Dmitri Mendeleev
The rows of the periodic chart are called ________.
Periods
This type of bond forms molecules from elements sharing electrons.
Covalent
If 2 atoms pull equally on the electrons, neither atom becomes charged. Happens when identical atoms are bonded. The covalent bond between 2 Iodine atoms are what kind of covalent bond?
Nonpolar
Used a beam of positively charged particles directed at gold foil to discover different charged particles. Discovered that atoms had a nucleus that contains protons.
Rutherford
The atomic number tells you how many _________ are in the atom.
Protons
The Lanthanide Series of elements on the Periodic Chart are also known as......
"Rare Earth Metals"
Ionic Bonds form __________ when 2 elements are bonded.
Compounds
Which bond creates compounds with higher melting points, higher electrical conductivity?
Ionic Bonds
Came up with a 4 part theory on atoms. He was somewhat correct on his theories, but helped build a path into discovering more about atoms in the years to come.
Dalton
Elements such as Oxygen, Nitrogen, and Carbon are in what group?
Non-Metals
What keeps Noble Gases from bonding with other elements?
The outer shell is complete with valence electrons.
This group of elements are good conductors of electricity and heat. Largest group in the periodic table and some have different numbers of valence electrons.
Transition Metals
With the electron dot diagram, show the bond between Hydrogen and Iodine.
H with I containing 8 dots surrounding it.
Discovered the neutron and that it is part of the atoms measureable mass.
James Chadwick
What group best bonds with Group 17, the Halogens? Why?
Alkali Metals or Group 1; Group 1 has one electron to give and Group 17 has one space to fill its outer shell.
What is a well-known chemical property of the Alkali Metals?
Highly Reactive
On the board, draw an electron dot diagram of Nitrogen. Atomic number of 7.
N with 5 dots.
What is the name of KF?
Potassium Fluoride
Developed a model illustrating rings to show electrons surrounding a nucleus. This shows a possible cloud of electrons in layers around the nucleus.
Why is the atomic mass number a decimal type number and not a whole number?
Average of different isotopes.
What are 3 physical properties of Gold
Ductile, Malleable, Shiny Luster
Which bonds best with Oxygen?
a. Beryllium
b. Sodium
c. Iodine
d. Xenon
a. Beryllium
How would you write the chemical formula for Aluminum Sulfate?
Al2(SO4)3