OXYGEN BY MARCELL FETTER OXYGEN IN THE PERIODIC

OXYGEN BY: MARCELL FETTER

OXYGEN IN THE PERIODIC TABLE

OXYGEN AS AN ELEMENT Atomic number: 8 Symbol: O Atomic mass: 15. 99 # of Protons: 8 # of Electrons: 8 # of Neutrons: ~16 – 8 = 8

OXYGEN IN EVERYDAY LIFE OXYGEN IS ONE OF THE MOST IMPORTANT PARTICLES ON EARTH. PEOPLE USE IT FOR MANY DIFFERENT THINGS, OTHER THAN BREATHING. • INDUSTRIES USE THE GAS FOR CUTTING, WELDING AND MELTING METALS. • OXYGEN TAKES UP ONE-FIFTH OF AIR VOLUME, TWO-THIRDS OF THE HUMAN BODY AND 87% WATER. • OF ALL THE USES FOR OXYGEN, SUSTAINING LIFE IS THE MOST IMPORTANT WHERE DOES OXYGEN COME FROM? • THERE ARE TWO NATURAL SOURCES OF OXYGEN. THE MAIN WAY IS VIA PHOTOSYNTHESIS WHICH CREATES ABOUT 98% OF THE EARTH'S OXYGEN. THE OTHER WAY IS BREAKING DOWN WATER MOLECULES BY ULTRAVIOLET RADIATION AND THIS MAKES UP THE OTHER 1 -2%.

OXYGEN TOXICITY THIS CONDITION TAKES PLACE WHEN SOMEONE BREATHES PURE OXYGEN. THE GAS IS ESSENTIAL FOR LIVING, BUT ONLY UP TO A POINT. HUMANS CAN ONLY BREATHE 21 PERCENT OXYGEN. THE AIR THAT HUMANS BREATHE IN IS COMPOSED OF NITROGEN AND OTHER ELEMENTS. WHEN TOO MUCH PURE OXYGEN IS INHALED, HUMANS WILL EXPERIENCE DIFFICULTY BREATHING AND TUNNEL VISION. 21% *Toxic: poisonous

STATES OF OXYGEN GAS SOLID LIQUID > > − 183 °C (− 297. 3 °F) − 218. 79 °C (− 361. 82 °F)

EARLY EXPERIMENTS, AND THE DISCOVERY OF OXYGEN THE WORD OXYGEN COMES FROM TWO GREEK WORDS. ”OXYS” WHICH MEANS SHARP OR ACID, AND ”GENES” WHICH MEANS BORN OR FORMER. ONE OF THE EARLIEST EXPERIMENTS WITH OXYGEN WAS DONE BY A GREEK PHILOSOPHER, PHILO OF BYZANTIUM IN THE 2 ND CENTURY (BCE). • BY USING HIS MODEL, SCIENTISTS FIGURED OUT THAT OXYGEN IS ESSENTIAL FOR FIRE OXYGEN WAS DISCOVERED BY A NUMBER OF SCIENTISTS. THE FIRST DISCOVERY WAS MADE BY A SWEDISH SCIENTIST, CARL WILHELM SCHEELE IN 1772. IN THE MEANTIME, A BRITISH CHEMIST JOSEPH PRIESTLEY, DISCOVERED OXYGEN INDEPENDENTLY IN 1774.

BREATHE IN, BREATHE OUT ENJOY OXYGEN! THANKS FOR WATCHING!