Unit B: Matter and Chemical Changes Flashcards
GAS -> SOLID
Deposition
SOLID -> GAS
Sublimation
List all 11 Physical Properties of Matter
- Color
- Lustre
- Melting/Freezing Point
- Boiling/Condensating Point
- Hardness
- Crystal Shape
- Density
- Solubility
- Conductivity
- Malleability
- Ductility
List all 5 Chemical Properties of Matter
- React with an Acid
- Ability to combust
- React with water
- React with air
- React with heat
What happens after a PHYSICAL change?
A substance may look different but the composition (what’s made of) stays the same
What happens after a CHEMICAL change?
Some New Substance is formed
list 5 Evidence of a chemical change?
- Change in an unexpected color
- Change in Odour
- formation of a new Solid (precipitation)
- Formation of a new gas (bubbles)
- Release or Absorb heat
(Exothermic) or (Endothermic)
LIQUID -> GAS
Evaporation
GAS -> LIQUID
Condensation
SOLID -> LIQUID
Melting
LIQUID -> SOLID
Freezing
How are PERIODS Aligned?
Horizontally
How are GROUPS Aligned?
Vertically
What’s Group 1 in the Periodic Table?
Alkali Metals
What’s Group 2 in the Periodic Table?
Alkali Earth Metals
What’s Group 17 in the Periodic Table?
Halogens
What’s Group 18 in the Periodic Table?
Noble Gases
How do you find Neutrons?
(Atomic Mass) - (# of Protons)
How do you find Protons AND Electrons?
The Atomic # has the same amount of protons and electrons
List all 10 Symbol Hazards
- Acute Toxicity
- Flammable
- Oxidizer
- Corrosive
- Irritant
- Health Hazard
- Aquatic Toxicity
- Explosive
- Compressed Gas
- Biohazardous
Who organized the Periodic Table?
Dimitri Mendeleev
What are the 4 properties of IONIC COMPOUNDS!
- Solid at room temperature
- High Melting Point and Boiling Point
- Good conductor of electricity (when dissolved in water)
- Distinct crystal shape
How do you read a CHEMICAL FORMULA?
Symbols -> What element
Number -> Number of atoms
How do you name IONIC COMPOUNDS?
Metal + Non-Metal “ide”
How are molecular compounds formed?
Ionic bonds -> exchange e-
Molecular bonds -> exchange e-
What are the 4 properties of MOLECULAR COMPOUNDS?
- Made of non-metals
- Solid, Liquid, and gas @ room temp
- Poor Conductors
- Low Melting Point and Boiling Point
How do you name MOLECULAR COMPOUNDS?
Prefix + Non-metal Prefix + Non-metal + ide
List the first 5 prefix’s
Mono, Di, Tri, Tetra, Penta
What are Reactants and Products
Reactants are the materials at the start of a reaction while Products are the materials at the end of a reaction
What are Endothermic Reactions?
Absorbs/Takes in energy
What are Exothermic Reactions?
Releases/gives off heat/energy
