UNIVERSE
PLANETARY FORMATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Hydrogen and Carbon
|
|
|
Carbon and Helium
|
|
|
Hydrogen and Oxygen
|
|
|
Hydrogen and Helium
|
Detailed explanation-1: -Hydrogen is the most abundant element in the universe, accounting for about 75 percent of its normal matter, and was created in the Big Bang. Helium is an element, usually in the form of a gas, that consists of a nucleus of two protons and two neutrons surrounded by two electrons.
Detailed explanation-2: -Helium is the second most abundant element in the universe after hydrogen.
Detailed explanation-3: -Oxygen is the third most abundant element in the Universe today, and in the very, very far future, may even have the opportunity to rise further as hydrogen (and then possibly helium) falls from its perch.
Detailed explanation-4: -Hydrogen is the most abundant element in the Universe. It is present on Earth in great quantities combined with other elements.
Detailed explanation-5: -Today hydrogen is estimated to account for 90% of all atoms in the universe, and it is essential to the material world.