The hydrogen and helium in our solar system were created from subatomic particles about ______ years ago. a. 14 billion b. 10.5 billion c. 7.0 billion d. 4.5 billion
Biology · High School · Mon Jan 18 2021
Answered on
Correct answer is d.
About 4.5 billion years ago our solar system formed from a cloud of gas and dust which slowly contracted under the mutual gravity of all of its particles. The cloud was made largely of hydrogen (H) with some helium (He) and small amounts of the remaining naturally occurring chemical elements.
The hydrogen and helium in our solar system were created from subatomic particles about 4.5 billion years ago .