Phys vs Chem Properties
Name 3 physical properties
Some examples of physical properties include colour, hardness, malleability, weight, electrical conductivity, solubility, mass, density, size, melting point, boiling point, length, and volume.
Freezing liquid water into ice is what type of change?
physical
Protons and neutrons together make up this part of the atom.
nucleus
This scientist proposed that all matter is made of small particles called atoms in the early 1800s.
John Dalton
How many electrons can fit on the first ring?
2 max
Name 3 chemical properties
flammability, toxicity, reactivity (e.g., with water or acid), corrosion resistance or rusting, heat of combustion, and pH/acidity
Frying an egg is what type of change?
Chemical
The charge of an electron is this.
negative
This scientist discovered the electron using the cathode ray tube experiment.
JJ Thomson
This is the name for the outermost electron shell of an atom.
valence shell
This physical property describes a substance's ability to allow heat or electricity to pass through it.
conductivity
When you see bubbles form after mixing two solutions but you are not boiling the substance, this is evidence of ...
Chemical change, a new substance (gas) is produced.
The number of protons in an atom determines this.
the identity of the element
This scientist conducted the gold foil experiment that showed atoms have a small dense nucleus.
Ernest Rutherford
How many electrons can fit on the 2nd and 3rd ring?
8 max on each ring
This physical property describes a substance's ability to be stretched into wires.
ductility
Name one reason why melting chocolate is considered a physical change.
What is no new substance is formed / it can change back when cooled
How do you figure out the number of neutrons of a single atom of an element?
Take the atomic mass (rounded) - atomic number (protons)
How did Niels Bohr improve the atomic model?
by suggesting electrons move in specific energy levels or shell - the planetary model
An atom that has gained or lost electrons becomes this.
an ion!
This chemical property describes how an iron substance reacts with oxygen to form... ?
rust
When a solid forms from two liquids mixing together, it is called this.
Precipitate
If an atom has 8 protons, it belongs to this element.
oxygen
This early Greek philosopher suggested matter was made of tiny indivisible particles called atoms.
Democritus
An atom that loses two electrons becomes this type of ion.
2+ ion (positive ion/cation)?