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Vocabulary
Signs of a Chemical Reaction
Reading Chemical Formulas
Writing Chemical Formulas
100
The building block of matter
What is an atom?
100
Bubbling indicates that a chemical change is producing this.
What is a gas?
100
These are the elements and their quantities present in this formula: CH4
What is: Carbon (1) Hydrogen (4)?
100
This compound is made up of: Sodium (1) Chlorine (1)
What is NaCl?
200
Two or more atoms that share a chemical bond
What is a molecule?
200
Two examples of this indication of a chemical change can be seen when: -Metals rust -Apple slices turn brown when left on the counter
What is a change in color?
200
These are the elements and their quantities present in this formula: O3
What is: Oxygen (3)?
200
This compound is made up of: Magnesium (1) Sulfur (1) Oxygen (4)
What is MgSO4?
300
A connection that is shared between atoms
What is a chemical bond?
300
A change in the physical properties that can be seen in an object indicates that new ________ are being formed.
What are substances?
300
These are the elements and their quantities present in this formula: C6 H12 O6
What is Carbon (6) Hydrogen (12) Oxygen (6)?
300
This compound is made up of: Carbon (2) Hydrogen (6) Oxygen (1)
What is C2H6O?
400
A change that DOES result in the formation of new substances
What is a chemical change?
400
A change in ________ indicates that our products have a different energy level from the reactants and are moving faster or slower speed.
What is temperature?
400
These are the elements and their quantities present in this formula: NaNO3
What is: Sodium (1) Nitrogen (1) Oxygen (3)
400
This molecule is made up of 2 oxygen atoms
What is O2?
500
A change that DOES NOT result in the formation of new substances
What is a physical change?
500
This is formed when two liquids react to form a solid.
What is a precipitate?
500
These are the elements and their quantities present in this formula: Ca(PO4)2
What is: Calcium (1) Phosphorous (2) Oxygen (8)?
500
This is a MIXTURE of 2 molecules: 1st molecule: Oxygen (2) 2nd molecule: Hydrogen (2)
What is O2 + H2?