Atomic Theory
Elements, compounds, Mixtures
Acids and Bases
Changes to Matter
Important Scientists
100
These particles have a positive electrical charge.
What are Protons?
100
Oxygen is an example of this.
What is an element?
100
This is the numeric range of the pH scale.
What is 0 to 14?
100
This occurs when two or more molecules interact to form new molecules.
What is a chemical change?
100
This scientist proposed that atoms are hard indestructable spheres.
Who is Dalton?
200
These subatomic particles have a negative electrical charge.
What are electrons?
200
Water (pictured below) is an example of this.
What is a compound?
200
This is the pH of a neutral substance, like water.
What is 7?
200
This occurs with a change to the appearance of a substance, but no new molecules are formed.
What is a physical change?
200
This scientist ran an experiment with gold and found that atoms contain mostly empty space but have a dense core.
Who is Rutherford?
300
This subatomic particle has no electrical charge.
What are neutrons?
300
Salt water is an example of this.
What is a mixture?
300
These are two physical properties that are associated with a base.
What is bitter and slippery?
300
A change in shape, texture, or state of matter are all evidence of this kind of change.
What is a physical change?
300
This scientist discovered negatively charged particles within neutral elements, then came up with the plum pudding model as an explanation.
Who is Thompson?
400
To get atomic mass, you need to add these two particles.
What are protons and neutrons?
400
Salt, Water, Iron Sulfide, and Sodium Chloride are all examples of this.
What are compounds?
400
pH is short for this term.
What is the Power of Hydrogen?
400
The release of a gas (bubbles), presence of a fire, or the formation of a precipitate are all evidence of this kind of change.
What is a chemical change?
400
This scientist proposed the atomic model commonly used in chemistry classes today to depict the subatomic particles of a given element. His model showed electrons in orbitals.
Who is Bohr?
500
Each different element has a consistent amount of these, which gives the element its atomic number.
What are protons?
500
This is a series of letters and numbers that represent Elements or Compounds in chemistry.
What is a chemical formula?
500
An acid has this chemical property.
What is reacting to metals?
500
What are the two types of evidence that can occur with a physical or chemical change, but they depend on whether or the change is expected.
What is a change in color or temperature?
500
He created a version of the periodic table of elements and predicted properties of elements that had not been discovered yet.
Who is Mendeleev?