The first 20 on the Periodic Table

Atomic Number – 1 Symbol – H Atomic Mass – 1.01 Interesting Facts - Gas at room temperature - Most abundant element in the universe - Found in water and most organic compounds

Atomic Number – 2 Symbol – He Atomic Mass – 4.00 Interesting Facts - non-reactive, non-toxic gas - less dense than air, which is why it makes your voice sound like a chipmunk when inhaled.

Atomic Number – 3 Symbol – Li Atomic Mass – 6.94 Interesting Facts - It is the lightest metal - Will react with water as it is an alkali metal

Atomic Number – 4 Symbol – Be Atomic Mass – 9.01 Interesting Facts - Used in windshield frames, brake discs, support beams, and other components of space aircrafts. - The most important use for beryllium is nuclear reactors and computer parts. - An alkali-earth metal

Atomic Number – 5 Symbol – B Atomic Mass – Interesting Facts - A metalloid that is Used in making calculators and computers - The name originates from the words “borax” and “carbon” - Is found in our bones and tissues in tiny amounts

Atomic Number – 6 Symbol - C Atomic Mass – Interesting Facts - A non-metal that is an extremely abundant element on Earth - Most commonly obtained throughout history from coal - Diamond is a naturally occurring form of Carbon - The human body contains a lot of carbon, and requires carbon for every stage of development

Atomic Number – 7 Symbol – N Atomic Mass – Interesting Facts - Most abundant element found in air (78%) - Nitrogen compounds are found in foods, fertilizers, poisons, and explosives. Your body is 3% nitrogen by weight.

Atomic Number – 8 Symbol – O Atomic Mass – Interesting Facts - A gas that makes up 21% of Air - Plants and animals require oxygen for respiration - Required for combustion - Ozone is made up of 3 oxygen atoms (O3)

Atomic Number – 9 Symbol – F Atomic Mass – Interesting Facts - A highly poisonous and very reactive gas - Used in refrigerators, air conditioning units and insecticides - An ion of fluorine (one extra electron) is called fluoride and is used in toothpaste and added to drinking water

Atomic Number –10 Symbol - Ne Atomic Mass – Interesting Facts - A stable non-reactive gas - Produces a red glow in a vaccuum tube

Atomic Number – 11 Symbol - Na Atomic Mass – Interesting Facts - A highly reactive silvery white alkali metal - When chemically bonded with chlorine it forms sodium chloride – aka. Table salt - Explodes when put in contact with water

Atomic Number – 12 Symbol – Mg Atomic Mass – Interesting Facts - An alkali earth metal - Used in missiles, flares and fireworks - Magnesium is important for strong bones, a healthy immune system, a sound nervous system, and for muscle contractions

Atomic Number – 13 Symbol – Al Atomic Mass – Interesting Facts - A very useful metal because it can be easily formed into various shapes - 29 million tons of Aluminum are required every year to meet global demand. Of this 22 million tons is new aluminum and 7 million tons is recycled. - The average lifespan of an aluminum beverage can is six weeks, including the time it takes to be manufactured, filled, sold, recycled and remanufactured.

Atomic Number – 14 Symbol – Si Atomic Mass – Interesting Facts - A non-metal that is found naturally in the earth’s crust - In the form of sand and clay it is used to make brick and concrete

Atomic Number –15 Symbol – P Atomic Mass – Interesting Facts - A non-metal that is a very important element in the human body - 85% of phosphorus in our bodies are in our bones and in our teeth - Important in many chemical reactions in our bodies

Atomic Number – 16 Symbol – S Atomic Mass – Interesting Facts - A non-metal that is found naturally in many foods - Occurs naturally in the environment – mainly in the Earth’s crust - An essential nutrient for plants - agriculture

Atomic Number – 17 Symbol – Cl Atomic Mass – Interesting Facts - Poisonous in gas form – toxic to humans in large amounts - In liquid form it is found in some cleaning products - Used in WWI as a gas that choked and killed people - Used in small amounts to kill bacteria in pools

Atomic Number – 18 Symbol – Ar Atomic Mass – Interesting Facts - A colourless, odourless gas - Makes up 0.93% of the Earth’s Atmosphere - A noble gas – making it very stable (unreacitive)

Atomic Number – 19 Symbol – K Atomic Mass – Interesting Facts - A soft silvery-white alkali metal - Essential for energy metabolism in the human body - Banana’s are a great source of potassium and prevent cramping during athletic activities

Atomic Number – 20 Symbol – Ca Atomic Mass – Interesting Facts - A soft grey alkali-earth metal - Essential for human nutrition - Essential to keep the human skeleton strong, egg shells hard and plants rigid

Memorize all 20 for Quiz next Class….