chemistry i – unit 3: atoms, molecules, matter & properties

Chemistry I – Unit 3:Atoms, Molecules, Matter &

Properties

• Matter that has uniform, unchanging composition or make up from one sample to another. [p55]

_________________ for example (eg.) Table Salt

_________________

U3: Atoms, Molecules & Matter

Substance(s)

• An identifying characteristic that can be observed or measured without changing the substance’s composition. [p. 56]

________________Eg. – density, color, odor,

taste, hardness, melting point (mp), boiling point (bp), physical state of matter @ different temperatures – to name a few…

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property

• Physical properties that are dependent upon the AMOUNT of the substance present or available. [p. 56]

________________Eg. – Mass (depends on the

amount) of an object/substance; length, volume, weight…

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property

PHYSICAL Property - Extensive

• Physical properties that are Independent [of] the AMOUNT of the substance present or available. [p 56]

________________Eg. – Density (g/cmᶟ)… the

bigger the object the more water it displaces and yet the “ratio” of grams over volume doesn’t change. Color, MP, BP, FP,

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property

PHYSICAL Property - Intensive

Physical properties that are dependent upon the AMOUNT of the substance present or available.

Physical properties that are independent [of] the amount of the substance present.Matter that has uniform, unchanging composition or make up from one sample to another.

An identifying characteristic that can be observed or measured without changing the substance’s composition.

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property

PHYSICAL Property - Extensive

PHYSICAL Property - Intensive

Physical properties that are dependent upon the AMOUNT of the substance present or available.

Physical properties that are independent [of] the amount of the substance present.Matter that has uniform, unchanging composition or make up from one sample to another.

An identifying characteristic that can be observed or measured without changing the substance’s composition.

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property

PHYSICAL Property - Extensive

PHYSICAL Property - Intensive

White crystal

Liquid @ ambient

19.4 g/cmᶟ

10 cm x 10 cm

Weighs 58.5 grams

Match stick broke in-half; both pieces are wood.

Mud puddle

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property - Extensive

PHYSICAL Property - Intensive

NON-Substance(s)

PHYSICAL Property - Extensive

PHYSICAL Property - Intensive

PHYSICAL Property - Intensive

White crystal

Liquid @ ambient

19.4 g/cmᶟ

10 cm x 10 cm

Weighs 58.5 grams

Match stick broke in-half; both pieces are wood.

Mud puddle

U3: Atoms, Molecules & Matter

Substance(s)

PHYSICAL Property - Intensive

PHYSICAL Property - Intensive

NON-Substance(s)

PHYSICAL Property - Intensive

PHYSICAL Property - Extensive

PHYSICAL Property - Extensive

• The ability of a substance to combine with –or change into – another substance.

• The contra-positive is true too; the Inability of a substance to combine with – or change into – another substance is ALSO considered to be a chemical property

Chemical Properties

U3: Atoms, Molecules & Matter

• The ability of a substance to combine with –or change into – another substance.

• The contra-positive is true too; the Inability of a substance to combine with – or change into – another substance is ALSO considered to be a chemical property

Chemical Properties

U3: Atoms, Molecules & Matter

Eg. – Steel wool (iron) in a capped test tube of N₂ gas will not react (chem property), but in O₂ gas it will “rust” (oxidize) or react.

Will form a green copper carbonate when in contact with moist (water carrying) air.

Reddish brown, shiny

D = 8.92 g/cm³

Will form new substances when combined with nitric acid and sulfuric acid.MP = 1,085 degrees C

Forms a deep blue solution when it comes in contact with ammonia.Good conductor of heat and electricity.BP = 2,570 degrees C

Easily formed into sheets (malleable) & drawn into wires (ductile)

Chem. Prop.

Phys. Prop. (Extrinsic)

Phys. Prop. (Intrinsic)

Chem. Prop.Chem. Prop.

Phys. Prop. (Extrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Will form a green copper carbonate when in contact with moist (water carrying) air.

Reddish brown, shiny

D = 8.92 g/cm³

Will form new substances when combined with nitric acid and sulfuric acid.MP = 1,085 degrees C

Forms a deep blue solution when it comes in contact with ammonia.Good conductor of heat and electricity.BP = 2,570 degrees C

Easily formed into sheets (malleable) & drawn into wires (ductile)

Chem. Prop.Phys. Prop. (Extrinsic)

Phys. Prop. (Intrinsic)

Chem. Prop.

Chem. Prop.

Phys. Prop. (Extrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)

Phys. Prop. (Intrinsic)