Chemistry Adda
Hydrogen was the first chemical element that appeared at the beginning of the universe’s existence. All the hydrogen in the world has existed since that time, and new hydrogen has not appeared. This means that the age of every atom of hydrogen in the world, including those in the human body, is around 13.5 billion years old. A little later, as a result of nuclear synthesis some hydrogen atoms became atoms of helium, carbon and so on. But around 75% of the mass of the visible universe still consists of hydrogen. Helium accounts for another 25%, and all the other remaining elements for just 2%. But on Earth, the mass of hydrogen and helium put together does not exceed 1% of the total elements.
Humans are made of atoms – billions and billions of them. But atoms themselves are nearly all made of nothing – pure empty space. Apart from the electrons, the protons, and the neutrons, they are in fact 99.9% space are vacant in atom .They are held together only by waves and atomic forces.
But If you were, somehow, to remove the space between all these little particles in the atom, they would be even tinier that all the atoms in all the people in the world could fit on a spoon.there are roughly about 10⁸⁰ atoms in universe.
मनुष्य परमाणुओं से बना है - अरबों और अरबों परमाणु के संयोजन से। लेकिन परमाणु के मध्य कुछ नहीं होता हैं इलेक्ट्रॉनों, प्रोटॉन और न्यूट्रॉन के अलावा, वास्तव में 99.9% परमाणु में खाली स्थान होता हैं। वे केवल तरंगों और परमाणु बलों द्वारा एक दूसरे से जुड़े होते हैं।
लेकिन यदि किसी तरह से परमाणु में उपस्थित इलेक्ट्रॉनों, प्रोटॉन और न्यूट्रॉन के कणों के मध्य उपस्थित खाली स्थान को हटा दिया जाए तो इतने छोटे हो जायेंगे दुनिया के सभी लोगो में उपस्थित समस्त परमाणुओं को एक चम्मच पर रखा जा सकता हैं। समस्त ब्रह्मांड में लगभग 10⁸⁰ परमाणु हैं।
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