Transcript First 20 Elements

The first 20 on the Periodic Table
http://www.youtube.com/watch?v=cAnOUwPfHlk
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 – 10.81
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 – 12.01
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 – 14.01
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 – 16.00
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 – 19.00
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 – 20.18
Interesting Facts
- A stable non-reactive gas
- Produces a red glow in a vaccuum tube
Atomic Number – 11
Symbol - Na
Atomic Mass – 22.99
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 – 24.31
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 – 26.98
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 – 28.09
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 – 30.97
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 – 32.07
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 – 35.45
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 – 39.95
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 – 39.10
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 – 40.08
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….