JOHN DALTON

JOHN DALTON TIMELINE.

• He was born on September 6, 1766.
• 1778 Started teaching at the age of 12.
• 1784 Became principal of the school at 18.
• 1793 He released his first book over meteorology.
• 1803 He made the the first chart of atomic weights.

TIMELINE CONTINUED

• 1808 He created the modern atomic theory.
• 1808 Created the first atomic model (example background)
• 1822 He turned down membership to the Royal Society.
• 1832 He begrudgingly accepted honorary Doctorate of science from Oxford
• 1834 The British government built a statue of him in his home town.

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• 1837 He suffered a stroke that made it hard to speak.
• He died on July 26, 1844.
• 1844 Over 40,000 people marched at his funeral procession.

DALTON'S ATOMIC THEORY

• In 1808 John Dalton created the first accecpted atomic theory.
• In his theory John Dalton stated that all matter are made of atoms.
• All atoms are indivisible and indestructible.
• All the atoms of a given element have identical mass and properties.
• The statement above was later disproven by the discovery of isotopes.

ATOMIC THEORY

• Compounds are formed by a combination of two or more atoms.
• A chemical reaction is a rearrangement of atoms.

INTERESTING FACTS

• Dalton kept a weather journal from 1787 until the day he died
• He studied color-blindness, which him and his brother suffer.
• He created the law of partial pressure.
• He used the excuse of color-blindness for graduation.
• He denied most fame and recognition.