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This element covers up 60-80 % mass of a star.

a. Helium
b. Hydrogen
c. Neon
d. Oxygen​


Sagot :

Answer:

B. Hydrogen

Explanation:

A young star is composed primarily of hydrogen, the simplest chemical element. This hydrogen ultimately leads to all known elements. first, the two constituents of each hydrogen atom—its proton and electron— are separated.

A and B mamili kalang gan parehas yan na sagot correct me if I'm wrong