Chemistry 1 Reviewer Louise Beltran 12 STEM 1
Lesson 1: 1. Pure substance
Matter and Its Properties - definite composition
Chemistry - distinct properties
- the scientific study of matter and the changes - Two classifications:
it undergoes. - Elements
- Central Science - Compounds
- it is encompassing as its basic 2. Mixture
knowledge is brought along to other - a combination of two or more
sciences such as biology, physics, substances
geology, ecology, and many other - in which the substances retain
subjects their distinct identities
- branch of Science that deals with: - components are not chemically
- study of matter combined and can be separated from
- composition one another by physical means
- structure - Two classifications:
- properties - Homogeneous mixture
- the way things interact - Heterogeneous mixture
- changes that things undergo
Matter and Its States
Matter
- anything that occupies space and has mass
- exists in three (3) states:
- solid
- liquid
- gas
Classification of Pure Substance:
1. Elements
- simplest form of matter
- can no longer be broken down into
simpler substances
- there are 118 known elements and 92
of them naturally occur on Earth
- examples:
- Gold (Au)
- Aluminum (Al)
- Carbon (C)
- Copper (Cu)
- Mercury (Hg)
- Sulfur (S)
Classification of Matter
Matter:
, Chemistry 1 Reviewer Louise Beltran 12 STEM 1
2. Compounds - Colloids
- consists of two or more elements - the dispersed particles
chemically united in fixed proportions are intermediate in
- examples: size between those of
- Water (H2O) the solution and
- Carbon dioxide (CO2) suspension
- Salt - particles are spread
- Sugar evenly throughout the
- Soap dispersion medium
- can be identified using
Classification of Mixtures: the Tyndall effect
1. Homogeneous
- uniform composition Physical and Chemical Properties
- components of the mixture are evenly Physical Properties
distributed - directly observable or measurable
- it is difficult to distinguish the - no change in composition
components of the mixture - includes the following:
- examples: - length
- Coffee - color
- Saltwater - temperature
- Air - shape
- Vinegar - viscosity
- Chocolate - malleability
2. Heterogeneous - boiling point
- no uniform composition - mass
- components are easily identifiable - density
- has at least two phases that remain - pressure
separate from each other - elasticity
- examples: - volume
- Fruit salad - luster
- bowl of oatmeal
- assorted nuts Chemical Properties
- chocolate chip cookie - not directly observable or measurable
- Two types: - can only be observed when the substance
- Suspension undergoes a chemical change
- some of the particles - includes the following:
settle out of the - toxicity
mixture upon standing - flammability
- particles in a - chemical bond
suspension are far - oxidation state
larger than those in - reactivity
the solution, so gravity - heats of combustion
is able to pull them - corrosivity
down out of the - coordination numbers
dispersion medium
- example: sand in
water
Lesson 1: 1. Pure substance
Matter and Its Properties - definite composition
Chemistry - distinct properties
- the scientific study of matter and the changes - Two classifications:
it undergoes. - Elements
- Central Science - Compounds
- it is encompassing as its basic 2. Mixture
knowledge is brought along to other - a combination of two or more
sciences such as biology, physics, substances
geology, ecology, and many other - in which the substances retain
subjects their distinct identities
- branch of Science that deals with: - components are not chemically
- study of matter combined and can be separated from
- composition one another by physical means
- structure - Two classifications:
- properties - Homogeneous mixture
- the way things interact - Heterogeneous mixture
- changes that things undergo
Matter and Its States
Matter
- anything that occupies space and has mass
- exists in three (3) states:
- solid
- liquid
- gas
Classification of Pure Substance:
1. Elements
- simplest form of matter
- can no longer be broken down into
simpler substances
- there are 118 known elements and 92
of them naturally occur on Earth
- examples:
- Gold (Au)
- Aluminum (Al)
- Carbon (C)
- Copper (Cu)
- Mercury (Hg)
- Sulfur (S)
Classification of Matter
Matter:
, Chemistry 1 Reviewer Louise Beltran 12 STEM 1
2. Compounds - Colloids
- consists of two or more elements - the dispersed particles
chemically united in fixed proportions are intermediate in
- examples: size between those of
- Water (H2O) the solution and
- Carbon dioxide (CO2) suspension
- Salt - particles are spread
- Sugar evenly throughout the
- Soap dispersion medium
- can be identified using
Classification of Mixtures: the Tyndall effect
1. Homogeneous
- uniform composition Physical and Chemical Properties
- components of the mixture are evenly Physical Properties
distributed - directly observable or measurable
- it is difficult to distinguish the - no change in composition
components of the mixture - includes the following:
- examples: - length
- Coffee - color
- Saltwater - temperature
- Air - shape
- Vinegar - viscosity
- Chocolate - malleability
2. Heterogeneous - boiling point
- no uniform composition - mass
- components are easily identifiable - density
- has at least two phases that remain - pressure
separate from each other - elasticity
- examples: - volume
- Fruit salad - luster
- bowl of oatmeal
- assorted nuts Chemical Properties
- chocolate chip cookie - not directly observable or measurable
- Two types: - can only be observed when the substance
- Suspension undergoes a chemical change
- some of the particles - includes the following:
settle out of the - toxicity
mixture upon standing - flammability
- particles in a - chemical bond
suspension are far - oxidation state
larger than those in - reactivity
the solution, so gravity - heats of combustion
is able to pull them - corrosivity
down out of the - coordination numbers
dispersion medium
- example: sand in
water
