diff --git a/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md b/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md index 191d711..08fc878 100644 --- a/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md +++ b/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md @@ -36,7 +36,7 @@ A property of a substance that is not measured and doesn't have a numerical value, such as colour, odour, and texture - Qualitative observation + Quantative observation An numerical observation @@ -148,7 +148,7 @@ 5. Each substance has unique particles that are different from the particles of other substances. ## Physical Properties -- A characeristic of a substance that can be determined without changing the composition ("make-up") of that substance +- A characteristic of a substance that can be determined without changing the composition ("make-up") of that substance - Characteristics can be determinded using your 5 senses and measuring instruments - smell, taste, touch, hearing, sight - scales, tape, measuring meter @@ -232,7 +232,7 @@ |Type|Properties|Picture| |:---|:---------|:------| |Metals|- Metals are good `conductors` of heat and electricity
- Metals are shiny(lustre)
- Metals are ductile (can be stretched into thin wires
- Metals are malleable (can be pounded into thin sheets)
- A chemical property of metal is its reaction with water which reults in corrosion|| -|Non-Metals|- Non-metals are poor conductors of heat and electricity
- Non-metal are **not** `ductile` or `malleable`
- Solid non-metals are `brittle` and break-easily
- They are `dull`
- Many non-metals are gases (one is liquid|| +|Non-Metals|- Non-metals are poor conductors of heat and electricity
- Non-metal are **not** `ductile` or `malleable`
- Solid non-metals are `brittle` and break-easily
- They are `dull`
- Many non-metals are gases (one is liquid)|| |Metalloids|- Metalloids (metal-like) have properties of both metals and non-metals
- They are solids that can be `shiny` or `dull`
- They `conduct` heat and electricity better than non-metals but not as well as metals
- They are `ductile` and `malleable`|| ## Periodic Table @@ -276,7 +276,7 @@ |John Dalton|- Billbard model, atoms of **different elements are different**
Atoms are never **created or destroyed**.
- Atoms of an element are identical|| |JJ Thomson|- Atoms contain negatively charged electrons, since atoms are neutral, the **rest of the atom is a positevly charged sphere**.
- Negatively charged electrons were **evenly distrubuted** throughout the atom.
- **Ray cathode experiment** - basically atoms were attracted to a postive end of the tube, so there most be negative charges in the atoms.

|| |Ernest Rutherford|- Discovered that the postively charged **nucleus**.
- The nucleus was **surrounded by a cloud of negatively charged electrons**
- Most of the atom was just space.
- **Gold foil experiement**, alpha particles (postively charged) shot at atom, some bounced off at weird angles, so there most be a postively charged thing there.

|| -|Niels Bohr|- Discovered that electrons **orbit the nucleus in fixed paths**, each electron has a **definite** amount of energy, further from nucles = more energy.
- Electrons **cannot** jump orbit to orbit or release energy as light going down.
- Each orbit can hold a specifc amount of electrons, `2,8,8,2`, useful for the first 20 elements|| +|Niels Bohr|- Discovered that electrons **orbit the nucleus in fixed paths**, each electron has a **definite** amount of energy, further from nucleus = more energy.
- Electrons **cannot** jump orbit to orbit or release energy as light going down.
- Each orbit can hold a specifc amount of electrons, `2,8,8,8`, useful for the first 20 elements|| |James Chadwick|- Discovered the neutron, mass of neutron = mass of proton (basically)
- Neutral atoms have **equal numbers** of protons and electrons.||