Which type of hydrogen is referred to as "heavy hydrogen"?

a. Tritium
b. Hydronium
c. Protium
d. Deuterium


d

Physics & Space Science

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How are sunspots in the northern and southern hemispheres different?

What will be an ideal response?

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Since the finding of dark energy, almost all data supports a(n) ________ universe

Fill in the blank(s) with correct word

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Seismic waves that travel through our planet are called ______________ waves

a. Earth b. planet c. body d. ground

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The energy level diagram for hydrogen


The energy of the most energetically possible photon emitted is __________.

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