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The First Two Elements. By Evelyn D’Elia. Basic Facts. Hydrogen. Physical Properties Colorless, odorless, and tasteless Lighter than air Lowest freezing point of any substance (absolute zero) Good conductor of both heat and electricity Not radioactive Chemical Properties

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By evelyn d elia

The First Two Elements

By Evelyn D’Elia



Hydrogen
Hydrogen

Physical Properties

  • Colorless, odorless, and tasteless

  • Lighter than air

  • Lowest freezing point of any substance (absolute zero)

  • Good conductor of both heat and electricity

  • Not radioactive

    Chemical Properties

  • Reactive (one e-)

  • Reacts with anything other than noble gases

    Uses

  • Processing fossil fuels

  • Detects leaks in food packages

    Interesting Facts

  • Most abundant element in the universe

  • Powers the sun (nuclear fusion into helium)

  • Doesn’t fit into any group on the Periodic Table


Helium
Helium

Physical Properties

  • Colorless, odorless, tasteless

  • Lighter than air

  • Lowest melting point of any element

  • Only element that cannot be solidified by lowering the temperature

  • Good conductor of heat and electricity

  • Not radioactive

    Chemical Properties

  • Rarely combines with other elements

  • Has a full outer shell of electrons

  • Non-flammable

    Uses

  • Cools superconducting magnets in MRI scanners

  • Makes airships and balloons float

  • Cryogenics

    Interesting Facts

  • Sound moves 3x faster in helium than in air

  • Produced through fusion in the sun and other stars

  • Takes energy out of an object, thus cooling it


Similarities between them
Similarities between Them

  • Nonmetal, gas

  • Colorless, odorless, tasteless

  • Lighter than air

  • Good conductors

  • Not radioactive

  • Detect leaks

  • Found in the sun