Lecture 1 - Electronic and Atomic Models of an atom

Actual NMAT question

Extensive = mga na papag add

Intensive Vs Extensive Property

Extensive

Heat (H) and Entropy (S): Intensive or Extensive Property?

Intensive (basta nidivide sa kg or mol)

Molar vs Specific: Intensive or Extensive Property?

Intensive

Molar vs Specific

Intensive- kasi constant kahit anong volume

Density: Intensive or Extensive Property?

Meta-stable = water to ice; diamond to graphite (more stable)

Stable States of matter vs Meta-stable states of matter

(+) ΔH if pumasok heat/energy like sa melting

(-) ΔH if lumabas heat/energy like sa freezing

ΔH = J/mol (ilang joules ang kailngan to melt yung mol)

Properties of Matter

Concept ng sphere

John Dalton Theory

Law of conservation of mass

H2O2 and H2O are same elements but different compounds

Joseph Proust Law of Multiple Proportion

Joseph Proust Law of Definite Proportion

cathode (+)

anode (-)

JJ thompson - electrons

Cathode ray experiment

Democritus atomic theory

JJ Thompson

Plum pudding model

Ernest Rutherford (1871-1937).

-actually protons lang sa kanya and not neutrons

-sa kanya din nucleus

Discovery of Nucleus

Ernest Rutherford (1871-1937)

alpha particle = helium

Nuclear binding energy = energy sa gitna kung para di lumabas ang proton

Gold Foil

James Chadwick

Discovery of Neutrons

proton + neutrons

Nucleons

beta (if mabagal)

x-ray (if mabilis)

electrons aka

positron

positive electron

Limited to Hydrogen

Electron Bohr model

E= energy na narelease ng electron nung tumalon form high to low state sa bohr model

ΔE= hv

higher

Shorter wavelengths correspond to lower/higher energy

7-1

Ex:

6-1 = pasok sa range

6-2= pasok sa range

Line Spectrum of UV range

7-2

Line Spectrum of Balmer/ Visible range

Paschen = 7-3

Brackett = 7-4

Pfund = 7-5

Line Spectrum of IR

R= constant (2 × 10 ^-18)

n_i= floor na pinanggalingan (final floor)