Question : The most abundant element is
Option 1: Calcium
Option 2: Silicon
Option 3: Oxygen
Option 4: Nitrogen
Correct Answer: Oxygen
Solution : The correct option is Oxygen.
After hydrogen and helium, oxygen is the third most abundant element in the universe (by mass). It also makes up the most abundant element (by mass) in the Earth's crust, accounting for nearly half of the crust's mass. Around 89% of the world's oceans are made up of oxygen, and 20% of the atmosphere is made up of diatomic oxygen gas.
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