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Hydrogen is the chemical element with atomic number 1


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The average diameter of the Earth is about 12,742 km
The average diameter of the Earth is about 12,742 km
The Solar System formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago
Hydrogen has an atomic weight of 1.00794 u
The Sun has a diameter of about 1,392,000 kilometers
Chemistry is for people interested in science, which is not all people.
About three-quarters of the Sun's mass consists of hydrogen, while most of the rest is helium
1000 meters equals 1 kilometers
The Sun accounts for about 99.86% of the Solar System's mass
Juipter is the largest planet in the Solar System
The planet formed 4.54 billion years ago
Earth is the third planet from the Sun
The Solar System formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago
Earth is the fifth-largest of the eight planets in the Solar System
Hydrogen is the lightest and most abundant chemical element, constituting roughly 75 % of the Universe\'s elemental mass
Earth is the fifth-largest of the eight planets in the Solar System
The meter was originally defined as 1/10,000,000 of the distance from the equator to the North Pole through Paris, France
The Moon makes a complete orbit around the Earth every 27.3 days
It would take more than 150 years to drive a car to the sun
Hydrogen is represented by the symbol H



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