Key Terms
Word Equations / Counting Atoms
Periodic Table
Atomic theory
Hodge Podge
100
formed when two or more atoms of the same element join together chemically.
What is a molecule
100
sodium + chlorine →
What is sodium chloride
100
The atomic number represents the number of
What is the number of protons
100
believed that matter was made up of four elements: earth, air, water and fire.
Who are Greek Philosophers
100
Number of Rows and Columns in the Periodic Table
What is 18 columns & 7 rows
200
an atom that has gained an electron
What is anion
200
name the elements in copper sulfate
What is copper, sulfur and oxygen
200
Family of elements with full valence shells.
What are the Noble Gases
200
Discovered the atom / developed the atomic theory
What is John Dalton
200
matter can classified as either
What are pure substances and mixtures
300
a type of bond that involves the sharing of electrons
What is a covalent bond
300
the number of atoms for each element in MgSO4
What is Magnesium = 1, Sodium = 1 Oxygen = 4
300
Created the Periodic table
What is Dmitri Mendeleev
300
Proposed the concept of electrons being in specific energy levels or shells and having particular amounts of energy.
Who is Niels Bohr
300
the process of liquid becoming a gas
What is evaporization
400
a material system made up of two or more different substances which are mixed but are not combined chemically. ...
What is a heterogeneous mixture
400
the number of atoms for each element in Na3PO4
What is Sodium = 3, Phosphorous = 1, Oxygen 4
400
# of electrons per energy level/shell
1st = 2; 2nd = 8; 3rd = 8; 4th = 18
400
Performed a gold foil experiment and discovered that atoms have a tiny, dense nucleus with electrons moving around it.
Who is Ernest Rutherford
400
the process of a gas becoming a liquid
What is condensation
500
Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition
What is a chemical property
500
number of atoms for each element in (NH4)2Cr2O7
What is Nitrogen=2, Hydrogen=8, Cesium=2, Oxygen = 7
500
the formula to find the number of nuetrons
What is Atomic Weight - Atomic Number (# of protons)
500
Proposed that atoms are not indivisible but have smaller particles inside them leading him to the discovery of the proton.
Who is J.J. thompson
500
name the different family groups
What are Alkali Metals, Alkaline earth metals, transition metals, Halogen gases, Noble gases, non-metals / metalloid, actinides, lactinides
M
e
n
u