Physical & Chemical Properties
This type of property can be observed without changing a substance’s identity
What is a physical property?
This scientist proposed the first modern atomic theory.
Who is John Dalton?
The small number in a chemical formula tells you this.
What is the number of atoms (subscript)?
The symbol for Oxygen.
What is O?
The charge of a proton.
What is positive (+1)?
This type of change forms a new substance.
What is a chemical change?
his model described electrons orbiting the nucleus like planets.
What is the Bohr model?
How many atoms are in H₂O?
What is 3 atoms?
The symbol for Sodium.
What is Na?
The particle with no charge.
What is a neutron?
A sign of a chemical reaction (e.g., bubbling or color change).
What is gas production (or color change, precipitate, etc.)?
This scientist discovered the electron.
Who is J.J. Thomson?
How many atoms are in CO₂?
What is 3 atoms?
The symbol for Potassium.
What is K?
Where electrons are found.
What are energy levels (or shells)?
The ability of a substance to react with oxygen.
What is reactivity?
This experiment led to the discovery of the nucleus.
What is the gold foil experiment?
How many atoms are in 2H₂O?
What is 6 atoms?
The symbol for Magnesium.
What is Mg?
Number of protons equals this.
What is the atomic number?
A property describing how a substance reacts with acid.
What is a chemical property?
The current model of the atom is called this.
What is the quantum mechanical model?
Total atoms in C₆H₁₂O₆.
What is 24 atoms?
The symbol for Calcium.
What is Ca?
Drawings showing electrons in shells are called this.
What are Bohr-Rutherford diagrams?